Function to check if a number is divisible by 5

How can I write a function m.file that takes as input a real number and checks to see if it is divisible by 5. An appropriate message indicating the result should be the output.

I have tried to write this but it dosen't seem to work as I need the user to input a number and check if it is divisble by 5

function [resp] = div5(x)
if (rem(x,5) == 0)
 resp = 1;
 else
  resp = 0;
end

Thanks in advance

[Walter Roberson]

it dosen't seem to work as I need the user to input a number

No, the assignment says that a real number will be provided to the function, not that you need to ask the user for input.

An appropriate message indicating the result should be the output.

You are not outputing any message, not to the screen and not as an output variable.

[hna]

How would I write it if I want to check if 10 is divisble by 5 for exemple ?

Should I do this:

function [resp] = div5(10)
if (rem(10,5) == 0)
    resp = 1;
else
    resp = 0;
end

[Walter Roberson]

No you would use the code from before and then at the command line

div5(10)

[Fahrizal Nurcahya]

bro it must be like this, check it my function

function [a] = div5(x)
% [x] = div5(x) - to checks a real number if it is divisible by 5.
    for a=rem(x,5)
        if a~=0
            [a] ='NOT divisible by 5.';
        else
            [a] ='divisible by 5.';
        end
    end
end

Answer 1

[AKASH KUMAR]

% check "a" is divisible by "b" or not
function test = divisibility_test(a,b)

if ceil(a/b)-a/b==0
    test = true;
else
    test=false;
end
end

[DGM]

The output of

ceil(a/b)-a/b==0

is a logical array, and the first conditional is only executed if every element of that array is true. So the whole thing simplifies to

function test = divisibility_test(a,b)
    test = all(ceil(a/b)-a/b==0);
end

or just

function test = divisibility_test(a,b)
    test = all(~mod(a,b));
end