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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 do we need to return in cases like this exactly? -> The method has not thrown any exception (input : 80)
I don't understand what kind of answer is expected in this case... The format of string in particular. it just says:'should raise an exception'. But doesn't take such an answer in string, in cases where it's actually an exception?