{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2025-12-14T01:33:56.000Z","description":"Problems submitted by members of the MATLAB Central community.","is_default":true,"created_by":161519,"badge_id":null,"featured":false,"trending":false,"solution_count_in_trending_period":0,"trending_last_calculated":"2025-12-14T00:00:00.000Z","image_id":null,"published":true,"community_created":false,"status_id":2,"is_default_group_for_player":false,"deleted_by":null,"deleted_at":null,"restored_by":null,"restored_at":null,"description_opc":null,"description_html":null,"published_at":null},"problems":[{"id":42085,"title":"Sum of digits of powers of 2","description":"Given n, first, calculate the number 2^n. Then, sum the digits that comprise that number. For example:\r\n\r\n Input: n = 7\r\n 2^n = 128\r\n Output: b = 1 + 2 + 8 = 11","description_html":"\u003cp\u003eGiven n, first, calculate the number 2^n. Then, sum the digits that comprise that number. For example:\u003c/p\u003e\u003cpre\u003e Input: n = 7\r\n 2^n = 128\r\n Output: b = 1 + 2 + 8 = 11\u003c/pre\u003e","function_template":"function y = sum_of_digits(n)\r\n  y = n;\r\nend","test_suite":"%%\r\nassert(isequal(sum_of_digits(1),2))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(3),8))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(4),7))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(5),5))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(7),11))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(9),8))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(11),14))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(14),22))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(16),25))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(20),31))","published":true,"deleted":false,"likes_count":0,"comments_count":2,"created_by":15348,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":72,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2015-04-21T10:55:37.000Z","updated_at":"2026-03-04T13:56:10.000Z","published_at":"2016-09-30T03:43:16.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven n, first, calculate the number 2^n. Then, sum the digits that comprise that number. For example:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[ Input: n = 7\\n 2^n = 128\\n Output: b = 1 + 2 + 8 = 11]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":45412,"title":"Determina el número de cifras de un número","description":"Crea una función que te devuelva el número de cifras de un número.\r\n\r\nAlgunos ejemplos para ayudarte serían: \r\nEl número 125 tiene 3 cifras.\r\n\r\nEl número 8749023 tiene 7 cifras.\r\n\r\nEl número 4 tiene 1 cifra.\r\n\r\nY así sucesivamente.\r\n\r\n","description_html":"\u003cp\u003eCrea una función que te devuelva el número de cifras de un número.\u003c/p\u003e\u003cp\u003eAlgunos ejemplos para ayudarte serían: \r\nEl número 125 tiene 3 cifras.\u003c/p\u003e\u003cp\u003eEl número 8749023 tiene 7 cifras.\u003c/p\u003e\u003cp\u003eEl número 4 tiene 1 cifra.\u003c/p\u003e\u003cp\u003eY así sucesivamente.\u003c/p\u003e","function_template":"function y = compute_number(x)\r\n \r\nend","test_suite":"%%\r\nx = 1000;\r\ny_correct = 4;\r\nassert(isequal(compute_number(x),y_correct))\r\n%%\r\nx = 0;\r\ny_correct = 1;\r\nassert(isequal(compute_number(x),y_correct))\r\n%%%\r\nx = 7675483;\r\ny_correct = 7;\r\nassert(isequal(compute_number(x),y_correct))\r\n%%%\r\nx=-2\r\ny_correct = 1;\r\nassert(isequal(compute_number(x),y_correct))\r\n%%%\r\nx=8476352689256\r\ny_correct = 13;\r\nassert(isequal(compute_number(x),y_correct))\r\n\r\n\r\n\r\n\r\n","published":true,"deleted":false,"likes_count":0,"comments_count":0,"created_by":394942,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":64,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2020-03-31T15:06:04.000Z","updated_at":"2026-02-18T09:33:27.000Z","published_at":"2020-04-03T07:06:53.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eCrea una función que te devuelva el número de cifras de un número.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eAlgunos ejemplos para ayudarte serían: El número 125 tiene 3 cifras.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eEl número 8749023 tiene 7 cifras.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eEl número 4 tiene 1 cifra.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eY así sucesivamente.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":2381,"title":"Sum of digit range","description":"Example: \r\n\r\nIf A is n1, and B is n2 digit positive numbers. A*B's digit range will be [c d] (c = min \u0026 d = max). \r\nThen return c+d.","description_html":"\u003cp\u003eExample:\u003c/p\u003e\u003cp\u003eIf A is n1, and B is n2 digit positive numbers. A*B's digit range will be [c d] (c = min \u0026 d = max). \r\nThen return c+d.\u003c/p\u003e","function_template":"function result = digitrange(n1,n2)\r\nresult = n1/n2;\r\nend","test_suite":"%%\r\nn1 = 758; n2 = 469;\r\ny_correct = 2453;\r\nassert(isequal(digitrange(n1,n2),y_correct))\r\n\r\n%%\r\nn1 = 6.23e4; n2 = 12;\r\ny_correct = 124623;\r\nassert(isequal(digitrange(n1,n2),y_correct))\r\n","published":true,"deleted":false,"likes_count":0,"comments_count":5,"created_by":27005,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":48,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2014-06-21T14:10:26.000Z","updated_at":"2025-07-19T04:59:52.000Z","published_at":"2014-06-21T14:10:29.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eExample:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eIf A is n1, and B is n2 digit positive numbers. A*B's digit range will be [c d] (c = min \u0026amp; d = max). Then return c+d.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":2527,"title":"Cull vector elements that contain a specified digit","description":"Given inputs of (1) a row vector and (2) a digit, identify the elements of that vector that contain the digit, remove them, and return the remaining elements.\r\n\r\nFor example,\r\n\r\n  digitRemove([1 2 5 13 55 23 15],5) --\u003e [1 2 13 23]\r\n\r\nand\r\n\r\n  digitRemove([3 24 7 9 18 55 67 71],7) --\u003e [3 24 9 18 55]\r\n","description_html":"\u003cp\u003eGiven inputs of (1) a row vector and (2) a digit, identify the elements of that vector that contain the digit, remove them, and return the remaining elements.\u003c/p\u003e\u003cp\u003eFor example,\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003edigitRemove([1 2 5 13 55 23 15],5) --\u0026gt; [1 2 13 23]\r\n\u003c/pre\u003e\u003cp\u003eand\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003edigitRemove([3 24 7 9 18 55 67 71],7) --\u0026gt; [3 24 9 18 55]\r\n\u003c/pre\u003e","function_template":"function y = digitRemove(v,d)\r\n  y = v;\r\nend","test_suite":"%%\r\nv = [1 2 5 13 55 23 15];\r\nd = 5;\r\ny_correct = [1 2 13 23];\r\nassert(isequal(digitRemove(v,d),y_correct))\r\n%%\r\nv = [3 24 7 9 18 55 67 71];\r\nd = 7;\r\ny_correct = [3 24 9 18 55];\r\nassert(isequal(digitRemove(v,d),y_correct))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":39,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":59,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2014-08-22T14:24:09.000Z","updated_at":"2025-12-02T09:30:16.000Z","published_at":"2014-08-22T14:26:13.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven inputs of (1) a row vector and (2) a digit, identify the elements of that vector that contain the digit, remove them, and return the remaining elements.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFor example,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[digitRemove([1 2 5 13 55 23 15],5) --\u003e [1 2 13 23]]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eand\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[digitRemove([3 24 7 9 18 55 67 71],7) --\u003e [3 24 9 18 55]]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":3018,"title":"Calculator spelling - Numbers to Letters","description":"Using the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\r\n\r\n* 0 = O\r\n* 1 = I\r\n* 2 = Z\r\n* 3 = E\r\n* 4 = h\r\n* 5 = S\r\n* 6 = g\r\n* 7 = L\r\n* 8 = B\r\n\r\nThere are a few other options, but we'll stick with these. The number may be a have a decimal with a leading zero, to produce a trailing O. If this is the case, ignore the decimal point. Write a function that takes a number as input and returns the word spelled (upside down) by the calculator. Make sure to get the case (capital vs. lowercase) right for each number/letter.\r\n\r\nThis problem is related to \u003chttps://www.mathworks.com/matlabcentral/cody/problems/3019-calculator-spelling-letters-to-numbers Problem 3019\u003e.","description_html":"\u003cp\u003eUsing the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\u003c/p\u003e\u003cul\u003e\u003cli\u003e0 = O\u003c/li\u003e\u003cli\u003e1 = I\u003c/li\u003e\u003cli\u003e2 = Z\u003c/li\u003e\u003cli\u003e3 = E\u003c/li\u003e\u003cli\u003e4 = h\u003c/li\u003e\u003cli\u003e5 = S\u003c/li\u003e\u003cli\u003e6 = g\u003c/li\u003e\u003cli\u003e7 = L\u003c/li\u003e\u003cli\u003e8 = B\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eThere are a few other options, but we'll stick with these. The number may be a have a decimal with a leading zero, to produce a trailing O. If this is the case, ignore the decimal point. Write a function that takes a number as input and returns the word spelled (upside down) by the calculator. Make sure to get the case (capital vs. lowercase) right for each number/letter.\u003c/p\u003e\u003cp\u003eThis problem is related to \u003ca href = \"https://www.mathworks.com/matlabcentral/cody/problems/3019-calculator-spelling-letters-to-numbers\"\u003eProblem 3019\u003c/a\u003e.\u003c/p\u003e","function_template":"function [word] = calc_spell_word(n)\r\n\r\nword = num2str(n);\r\n\r\nend\r\n","test_suite":"%%\r\nn = 35007;\r\ntxt = 'LOOSE';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 77345;\r\ntxt = 'ShELL';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 36138;\r\ntxt = 'BEIgE';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 378806;\r\ntxt = 'gOBBLE';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 376006;\r\ntxt = 'gOOgLE';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 57738461375;\r\ntxt = 'SLEIghBELLS';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 0.7734;\r\ntxt = 'hELLO';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 53045;\r\ntxt = 'ShOES';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 771;\r\ntxt = 'ILL';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 345;\r\ntxt = 'ShE';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 7735;\r\ntxt = 'SELL';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nind = randi(4);\r\nn_arr = [36138 707 7714 57738];\r\nn = n_arr(ind);\r\ntxt_arr = {'BEIgE','LOL','hILL','BELLS'};\r\ntxt = txt_arr{ind};\r\nassert(isequal(calc_spell_word(n),txt))\r\n","published":true,"deleted":false,"likes_count":3,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":72,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":32,"created_at":"2015-02-14T22:05:44.000Z","updated_at":"2026-03-19T20:03:05.000Z","published_at":"2015-02-14T22:05:44.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eUsing the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e0 = O\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e1 = I\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e2 = Z\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e3 = E\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e4 = h\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e5 = S\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e6 = g\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e7 = L\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e8 = B\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThere are a few other options, but we'll stick with these. The number may be a have a decimal with a leading zero, to produce a trailing O. If this is the case, ignore the decimal point. Write a function that takes a number as input and returns the word spelled (upside down) by the calculator. Make sure to get the case (capital vs. lowercase) right for each number/letter.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThis problem is related to\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"https://www.mathworks.com/matlabcentral/cody/problems/3019-calculator-spelling-letters-to-numbers\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eProblem 3019\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":3019,"title":"Calculator spelling - Letters to Numbers","description":"Using the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\r\n\r\n* 0 = O\r\n* 1 = I\r\n* 2 = Z\r\n* 3 = E\r\n* 4 = h\r\n* 5 = S\r\n* 6 = g\r\n* 7 = L\r\n* 8 = B\r\n\r\nThere are a few other options, but we'll stick with these. If the word has a trailing O, the number will need a decimal point to produce a leading zero. Write a function that takes a word (upside down) as input and returns the number entered into the calculator.\r\n\r\nThis problem is related to \u003chttps://www.mathworks.com/matlabcentral/cody/problems/3018-calculator-spelling-numbers-to-letters Problem 3018\u003e.","description_html":"\u003cp\u003eUsing the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\u003c/p\u003e\u003cul\u003e\u003cli\u003e0 = O\u003c/li\u003e\u003cli\u003e1 = I\u003c/li\u003e\u003cli\u003e2 = Z\u003c/li\u003e\u003cli\u003e3 = E\u003c/li\u003e\u003cli\u003e4 = h\u003c/li\u003e\u003cli\u003e5 = S\u003c/li\u003e\u003cli\u003e6 = g\u003c/li\u003e\u003cli\u003e7 = L\u003c/li\u003e\u003cli\u003e8 = B\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eThere are a few other options, but we'll stick with these. If the word has a trailing O, the number will need a decimal point to produce a leading zero. Write a function that takes a word (upside down) as input and returns the number entered into the calculator.\u003c/p\u003e\u003cp\u003eThis problem is related to \u003ca href = \"https://www.mathworks.com/matlabcentral/cody/problems/3018-calculator-spelling-numbers-to-letters\"\u003eProblem 3018\u003c/a\u003e.\u003c/p\u003e","function_template":"function [n] = calc_spell_num(word)\r\n\r\nn = str2num(word);\r\n\r\nend\r\n","test_suite":"%%\r\nn = 35007;\r\nword = 'LOOSE';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 77345;\r\nword = 'ShELL';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 36138;\r\nword = 'BEIgE';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 378806;\r\nword = 'gOBBLE';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 376006;\r\nword = 'gOOgLE';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 57738461375;\r\nword = 'SLEIghBELLS';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 0.7734;\r\nword = 'hELLO';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 53045;\r\nword = 'ShOES';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 771;\r\nword = 'ILL';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 345;\r\nword = 'ShE';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 7735;\r\nword = 'SELL';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nind = randi(4);\r\nn_arr = [36138 707 7714 57738];\r\nn = n_arr(ind);\r\nword_arr = {'BEIgE','LOL','hILL','BELLS'};\r\nword = word_arr{ind};\r\nassert(isequal(calc_spell_num(word),n))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":68,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":32,"created_at":"2015-02-14T22:18:14.000Z","updated_at":"2026-03-23T20:41:48.000Z","published_at":"2015-02-14T22:18:14.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eUsing the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e0 = O\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e1 = I\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e2 = Z\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e3 = E\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e4 = h\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e5 = S\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e6 = g\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e7 = L\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e8 = B\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThere are a few other options, but we'll stick with these. If the word has a trailing O, the number will need a decimal point to produce a leading zero. Write a function that takes a word (upside down) as input and returns the number entered into the calculator.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThis problem is related to\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"https://www.mathworks.com/matlabcentral/cody/problems/3018-calculator-spelling-numbers-to-letters\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eProblem 3018\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"problem_search":{"errors":[],"problems":[{"id":42085,"title":"Sum of digits of powers of 2","description":"Given n, first, calculate the number 2^n. Then, sum the digits that comprise that number. For example:\r\n\r\n Input: n = 7\r\n 2^n = 128\r\n Output: b = 1 + 2 + 8 = 11","description_html":"\u003cp\u003eGiven n, first, calculate the number 2^n. Then, sum the digits that comprise that number. For example:\u003c/p\u003e\u003cpre\u003e Input: n = 7\r\n 2^n = 128\r\n Output: b = 1 + 2 + 8 = 11\u003c/pre\u003e","function_template":"function y = sum_of_digits(n)\r\n  y = n;\r\nend","test_suite":"%%\r\nassert(isequal(sum_of_digits(1),2))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(3),8))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(4),7))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(5),5))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(7),11))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(9),8))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(11),14))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(14),22))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(16),25))\r\n\r\n%%\r\nassert(isequal(sum_of_digits(20),31))","published":true,"deleted":false,"likes_count":0,"comments_count":2,"created_by":15348,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":72,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2015-04-21T10:55:37.000Z","updated_at":"2026-03-04T13:56:10.000Z","published_at":"2016-09-30T03:43:16.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven n, first, calculate the number 2^n. Then, sum the digits that comprise that number. For example:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[ Input: n = 7\\n 2^n = 128\\n Output: b = 1 + 2 + 8 = 11]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":45412,"title":"Determina el número de cifras de un número","description":"Crea una función que te devuelva el número de cifras de un número.\r\n\r\nAlgunos ejemplos para ayudarte serían: \r\nEl número 125 tiene 3 cifras.\r\n\r\nEl número 8749023 tiene 7 cifras.\r\n\r\nEl número 4 tiene 1 cifra.\r\n\r\nY así sucesivamente.\r\n\r\n","description_html":"\u003cp\u003eCrea una función que te devuelva el número de cifras de un número.\u003c/p\u003e\u003cp\u003eAlgunos ejemplos para ayudarte serían: \r\nEl número 125 tiene 3 cifras.\u003c/p\u003e\u003cp\u003eEl número 8749023 tiene 7 cifras.\u003c/p\u003e\u003cp\u003eEl número 4 tiene 1 cifra.\u003c/p\u003e\u003cp\u003eY así sucesivamente.\u003c/p\u003e","function_template":"function y = compute_number(x)\r\n \r\nend","test_suite":"%%\r\nx = 1000;\r\ny_correct = 4;\r\nassert(isequal(compute_number(x),y_correct))\r\n%%\r\nx = 0;\r\ny_correct = 1;\r\nassert(isequal(compute_number(x),y_correct))\r\n%%%\r\nx = 7675483;\r\ny_correct = 7;\r\nassert(isequal(compute_number(x),y_correct))\r\n%%%\r\nx=-2\r\ny_correct = 1;\r\nassert(isequal(compute_number(x),y_correct))\r\n%%%\r\nx=8476352689256\r\ny_correct = 13;\r\nassert(isequal(compute_number(x),y_correct))\r\n\r\n\r\n\r\n\r\n","published":true,"deleted":false,"likes_count":0,"comments_count":0,"created_by":394942,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":64,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2020-03-31T15:06:04.000Z","updated_at":"2026-02-18T09:33:27.000Z","published_at":"2020-04-03T07:06:53.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eCrea una función que te devuelva el número de cifras de un número.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eAlgunos ejemplos para ayudarte serían: El número 125 tiene 3 cifras.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eEl número 8749023 tiene 7 cifras.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eEl número 4 tiene 1 cifra.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eY así sucesivamente.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":2381,"title":"Sum of digit range","description":"Example: \r\n\r\nIf A is n1, and B is n2 digit positive numbers. A*B's digit range will be [c d] (c = min \u0026 d = max). \r\nThen return c+d.","description_html":"\u003cp\u003eExample:\u003c/p\u003e\u003cp\u003eIf A is n1, and B is n2 digit positive numbers. A*B's digit range will be [c d] (c = min \u0026 d = max). \r\nThen return c+d.\u003c/p\u003e","function_template":"function result = digitrange(n1,n2)\r\nresult = n1/n2;\r\nend","test_suite":"%%\r\nn1 = 758; n2 = 469;\r\ny_correct = 2453;\r\nassert(isequal(digitrange(n1,n2),y_correct))\r\n\r\n%%\r\nn1 = 6.23e4; n2 = 12;\r\ny_correct = 124623;\r\nassert(isequal(digitrange(n1,n2),y_correct))\r\n","published":true,"deleted":false,"likes_count":0,"comments_count":5,"created_by":27005,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":48,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2014-06-21T14:10:26.000Z","updated_at":"2025-07-19T04:59:52.000Z","published_at":"2014-06-21T14:10:29.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eExample:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eIf A is n1, and B is n2 digit positive numbers. A*B's digit range will be [c d] (c = min \u0026amp; d = max). Then return c+d.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":2527,"title":"Cull vector elements that contain a specified digit","description":"Given inputs of (1) a row vector and (2) a digit, identify the elements of that vector that contain the digit, remove them, and return the remaining elements.\r\n\r\nFor example,\r\n\r\n  digitRemove([1 2 5 13 55 23 15],5) --\u003e [1 2 13 23]\r\n\r\nand\r\n\r\n  digitRemove([3 24 7 9 18 55 67 71],7) --\u003e [3 24 9 18 55]\r\n","description_html":"\u003cp\u003eGiven inputs of (1) a row vector and (2) a digit, identify the elements of that vector that contain the digit, remove them, and return the remaining elements.\u003c/p\u003e\u003cp\u003eFor example,\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003edigitRemove([1 2 5 13 55 23 15],5) --\u0026gt; [1 2 13 23]\r\n\u003c/pre\u003e\u003cp\u003eand\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003edigitRemove([3 24 7 9 18 55 67 71],7) --\u0026gt; [3 24 9 18 55]\r\n\u003c/pre\u003e","function_template":"function y = digitRemove(v,d)\r\n  y = v;\r\nend","test_suite":"%%\r\nv = [1 2 5 13 55 23 15];\r\nd = 5;\r\ny_correct = [1 2 13 23];\r\nassert(isequal(digitRemove(v,d),y_correct))\r\n%%\r\nv = [3 24 7 9 18 55 67 71];\r\nd = 7;\r\ny_correct = [3 24 9 18 55];\r\nassert(isequal(digitRemove(v,d),y_correct))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":39,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":59,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2014-08-22T14:24:09.000Z","updated_at":"2025-12-02T09:30:16.000Z","published_at":"2014-08-22T14:26:13.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven inputs of (1) a row vector and (2) a digit, identify the elements of that vector that contain the digit, remove them, and return the remaining elements.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFor example,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[digitRemove([1 2 5 13 55 23 15],5) --\u003e [1 2 13 23]]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eand\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[digitRemove([3 24 7 9 18 55 67 71],7) --\u003e [3 24 9 18 55]]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":3018,"title":"Calculator spelling - Numbers to Letters","description":"Using the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\r\n\r\n* 0 = O\r\n* 1 = I\r\n* 2 = Z\r\n* 3 = E\r\n* 4 = h\r\n* 5 = S\r\n* 6 = g\r\n* 7 = L\r\n* 8 = B\r\n\r\nThere are a few other options, but we'll stick with these. The number may be a have a decimal with a leading zero, to produce a trailing O. If this is the case, ignore the decimal point. Write a function that takes a number as input and returns the word spelled (upside down) by the calculator. Make sure to get the case (capital vs. lowercase) right for each number/letter.\r\n\r\nThis problem is related to \u003chttps://www.mathworks.com/matlabcentral/cody/problems/3019-calculator-spelling-letters-to-numbers Problem 3019\u003e.","description_html":"\u003cp\u003eUsing the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\u003c/p\u003e\u003cul\u003e\u003cli\u003e0 = O\u003c/li\u003e\u003cli\u003e1 = I\u003c/li\u003e\u003cli\u003e2 = Z\u003c/li\u003e\u003cli\u003e3 = E\u003c/li\u003e\u003cli\u003e4 = h\u003c/li\u003e\u003cli\u003e5 = S\u003c/li\u003e\u003cli\u003e6 = g\u003c/li\u003e\u003cli\u003e7 = L\u003c/li\u003e\u003cli\u003e8 = B\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eThere are a few other options, but we'll stick with these. The number may be a have a decimal with a leading zero, to produce a trailing O. If this is the case, ignore the decimal point. Write a function that takes a number as input and returns the word spelled (upside down) by the calculator. Make sure to get the case (capital vs. lowercase) right for each number/letter.\u003c/p\u003e\u003cp\u003eThis problem is related to \u003ca href = \"https://www.mathworks.com/matlabcentral/cody/problems/3019-calculator-spelling-letters-to-numbers\"\u003eProblem 3019\u003c/a\u003e.\u003c/p\u003e","function_template":"function [word] = calc_spell_word(n)\r\n\r\nword = num2str(n);\r\n\r\nend\r\n","test_suite":"%%\r\nn = 35007;\r\ntxt = 'LOOSE';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 77345;\r\ntxt = 'ShELL';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 36138;\r\ntxt = 'BEIgE';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 378806;\r\ntxt = 'gOBBLE';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 376006;\r\ntxt = 'gOOgLE';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 57738461375;\r\ntxt = 'SLEIghBELLS';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 0.7734;\r\ntxt = 'hELLO';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 53045;\r\ntxt = 'ShOES';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 771;\r\ntxt = 'ILL';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 345;\r\ntxt = 'ShE';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nn = 7735;\r\ntxt = 'SELL';\r\nassert(isequal(calc_spell_word(n),txt))\r\n\r\n%%\r\nind = randi(4);\r\nn_arr = [36138 707 7714 57738];\r\nn = n_arr(ind);\r\ntxt_arr = {'BEIgE','LOL','hILL','BELLS'};\r\ntxt = txt_arr{ind};\r\nassert(isequal(calc_spell_word(n),txt))\r\n","published":true,"deleted":false,"likes_count":3,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":72,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":32,"created_at":"2015-02-14T22:05:44.000Z","updated_at":"2026-03-19T20:03:05.000Z","published_at":"2015-02-14T22:05:44.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eUsing the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e0 = O\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e1 = I\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e2 = Z\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e3 = E\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e4 = h\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e5 = S\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e6 = g\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e7 = L\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e8 = B\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThere are a few other options, but we'll stick with these. The number may be a have a decimal with a leading zero, to produce a trailing O. If this is the case, ignore the decimal point. Write a function that takes a number as input and returns the word spelled (upside down) by the calculator. Make sure to get the case (capital vs. lowercase) right for each number/letter.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThis problem is related to\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"https://www.mathworks.com/matlabcentral/cody/problems/3019-calculator-spelling-letters-to-numbers\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eProblem 3019\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":3019,"title":"Calculator spelling - Letters to Numbers","description":"Using the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\r\n\r\n* 0 = O\r\n* 1 = I\r\n* 2 = Z\r\n* 3 = E\r\n* 4 = h\r\n* 5 = S\r\n* 6 = g\r\n* 7 = L\r\n* 8 = B\r\n\r\nThere are a few other options, but we'll stick with these. If the word has a trailing O, the number will need a decimal point to produce a leading zero. Write a function that takes a word (upside down) as input and returns the number entered into the calculator.\r\n\r\nThis problem is related to \u003chttps://www.mathworks.com/matlabcentral/cody/problems/3018-calculator-spelling-numbers-to-letters Problem 3018\u003e.","description_html":"\u003cp\u003eUsing the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\u003c/p\u003e\u003cul\u003e\u003cli\u003e0 = O\u003c/li\u003e\u003cli\u003e1 = I\u003c/li\u003e\u003cli\u003e2 = Z\u003c/li\u003e\u003cli\u003e3 = E\u003c/li\u003e\u003cli\u003e4 = h\u003c/li\u003e\u003cli\u003e5 = S\u003c/li\u003e\u003cli\u003e6 = g\u003c/li\u003e\u003cli\u003e7 = L\u003c/li\u003e\u003cli\u003e8 = B\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eThere are a few other options, but we'll stick with these. If the word has a trailing O, the number will need a decimal point to produce a leading zero. Write a function that takes a word (upside down) as input and returns the number entered into the calculator.\u003c/p\u003e\u003cp\u003eThis problem is related to \u003ca href = \"https://www.mathworks.com/matlabcentral/cody/problems/3018-calculator-spelling-numbers-to-letters\"\u003eProblem 3018\u003c/a\u003e.\u003c/p\u003e","function_template":"function [n] = calc_spell_num(word)\r\n\r\nn = str2num(word);\r\n\r\nend\r\n","test_suite":"%%\r\nn = 35007;\r\nword = 'LOOSE';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 77345;\r\nword = 'ShELL';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 36138;\r\nword = 'BEIgE';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 378806;\r\nword = 'gOBBLE';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 376006;\r\nword = 'gOOgLE';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 57738461375;\r\nword = 'SLEIghBELLS';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 0.7734;\r\nword = 'hELLO';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 53045;\r\nword = 'ShOES';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 771;\r\nword = 'ILL';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 345;\r\nword = 'ShE';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nn = 7735;\r\nword = 'SELL';\r\nassert(isequal(calc_spell_num(word),n))\r\n\r\n%%\r\nind = randi(4);\r\nn_arr = [36138 707 7714 57738];\r\nn = n_arr(ind);\r\nword_arr = {'BEIgE','LOL','hILL','BELLS'};\r\nword = word_arr{ind};\r\nassert(isequal(calc_spell_num(word),n))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":68,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":32,"created_at":"2015-02-14T22:18:14.000Z","updated_at":"2026-03-23T20:41:48.000Z","published_at":"2015-02-14T22:18:14.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"targetMode\":\"\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"targetMode\":\"\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eUsing the numbers on a calculator, and rotating the display 180 degrees, many words can be spelled. In particular, the following numbers can characterize the following letters:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e0 = O\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e1 = I\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e2 = Z\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e3 = E\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e4 = h\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e5 = S\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e6 = g\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e7 = L\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e8 = B\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThere are a few other options, but we'll stick with these. If the word has a trailing O, the number will need a decimal point to produce a leading zero. Write a function that takes a word (upside down) as input and returns the number entered into the calculator.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThis problem is related to\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"https://www.mathworks.com/matlabcentral/cody/problems/3018-calculator-spelling-numbers-to-letters\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eProblem 3018\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" 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