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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.
Wrong error message.
When table is wrong, the message is "Empty array"
Why ?
It's just a loop!!
it don't loose decimal because PI has decimals. When you multiply an integer with a double or a float, the result is an double or a float, like here.