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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.
what will be the test case which will return None as a result.
I have tried with various options.. and it wroked.. and when i am running the sample test cases.. its failing.
Also tried using None keyword.. but it fails as other than integer (be it + or -) is not allowed (NoneType not defined).
Please share one case which expects the result as None.