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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.
I did not remember which variable the number pi was stored in, I was too lazy to find out about it at the time of solving the problem
It's always good to have a π along ;-)