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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.
No,
If you multiply 0 to any number it will become 0, so no error
if the valor of variables is 0 would throw error.
wow,i did not know that method existed.