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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.
Aaaaaa thanks a lot for the explanation!
For better performance.
To check if 25 is prime or not, you only have to check if 25 can be divided by 2,3,4,5. 5 (is sqrt(25)).
OOOO thanks a lot!
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It turns the int into a String. Same as the .toString() method.
Hey! Can you explain what ('' + s) means why he used that way? I just can't understand the logic at all.