For a given input string str, find how many spaces are there in the string and replace those spaces with *
e.g. str = 'this is demo of replacing spaces with stars';
out = 'this*is*demo*of*replacing*spaces*with*stars'
Get the length of a given vector
frame of the matrix
Volume and area of a sphere
01 - Scalar variables
Find the product of a Vector
Who is the baby and who is the daddy in this family?
Create a v-notch vector without "sort" function
Let's get back to school: create mixed numbered fraction
Matrix rotation as per given angle
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