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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.
Thank you @St3f4n i understand it now i'm a beginner in JS thats why it seems weird for me.
can somebody explain to me why in the code there is the plus sign in the beggining of the code in my code i used parseFloat but this plus in the beggining i didnt understand .