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.
Hah, fair enough. I had the same problem! For some reason, I couldn't think of this case. :)
I had the same issue. For me it was the test when you input 0.
Not an issue. Your code is wrong.