Loading collection data...
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.
That was exactly it. Thank you!
Probably how your function is handling a negative number as input.
I have attempted to submit but get a failure on the 4th test: '' should equal None. I though this might be saying that an empty string for n (i.e. an invalid input) should return None but I got that working and it tested just fine. Could anyone offer insight into what that failure might indicate that they are testing against?