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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
No, Sir, it will not,due to 'return' get out immediatelly of the function.
I agree, the default/return should be set as string "invalid value".
Unfortunately, CodeWars test output is HTML. So it hides extra spaces, for example.
I suggest doing the following in your code before returning the result, it would help: