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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.
Returning inconsistent datatypes is not good programming.
I would suggest expecting an
Error
(e.g. aRangeError
) to be thrown if the input is an invalid number. Or maybe expecting-1
to be returned.false
even has the same truthiness as the correct return value for the valid input6174
. :[