The error is presented in a bad way, but it points to a mistake in your code. It means that there is a test case where you returned String, but you should return int[ ]. Or the other way round.

I re-raised an issue with some more details above. To pass the tests you need to identify a test case which fails for you and fix it.

Read the description again. * is a masked char, and the numbers in the example in the description are divisible by 6. Not a kata issue.

xoxo

<3

learning from the best;)

Basically,

if something results in True, it needs to be returned as "True"

if something results in False, it needs to be returned as "False"

Hope that helps

What do you need explaining?

The error is originated in your code. You're doing really weird things... callee saved registers must have the same values at the start and at the end of your function.

You must return the nth number, let's say x, for which x ^ 2 's last digits are the same digits as x. There are examples in the description that illustrate this quite well IMO.

Because that's not the test your code fails, print the input properly. And don't try to read the length of null.

When an array in the array is null or empty, the method should return 0 too!

An array containing null is not a null array.

If the array of arrays is null/nil or empty, the method should return 0.

It's already there.

Why cant you check the number if it's negative?

Fixed.