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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.
What if the user specifies -3 or a number greater than 9?
super, short and clear
returns errors
Uncaught Type Error:
Return value of fake_bin2() must be of the type string, none returned in file:16 Stack trace: #0 file(18):
fake_bin2('9152733') #1 {main} thrown in file on line 16
I realized my mistake, thank you for the solution
cool solution, easy and clear