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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.
Not a best pracitices for me, the name of first variable should not be named average, but sum... imho.
yeah, sure. If statment is true then it is not end of the word, this way you dont need to do else, becouse if first statement is false, then you should add . at the end. Try it.
in format() function u dont need else statment. And its clever.