Sorry for that, I didn't know! Thanks.

Always use the spoiler flag when discussing solutions. I have added the flag to your comment.

Thanks for pointing that out, didn't realize that when I was first learning to code.

You don't need to use break after return

Fixed

On the C++ version of this kata, the sample test case is missing Describe(ElementSum){
it gives an errors if you dont add it in yourself, some may have trouble with this.

Ahh, yes, thank you for pointing that out, that makes perfect sense.

Every time the first element of your || clause is 0, a legitimate value, you still use the default value.

Yes, I was returning it as a string, it was expecting a number, once I converted it the test passed.