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.
The tests don't have a case for non-negative integers being returned as described in the challenge instructions. Due to this missing test case codewarriors are able to pass the kata even though it's not truly fulfilled.