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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.
impressively
Will this work if r <= 0?
Seems to me it won't, I could be wrong. If I am wrong here, could someone please explain why?
like If r == 0, then r%2==0 so it returns (0, string..string)....... infinite loop