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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.
Definitely not "best practices"!
Improve the description to avoid being too abstract. According to your description just returning 123 should be correct in every case regardless of the input integer.
Just a friendly reminder, think about what happens when you multiply nummbers with 0.....
I know this can be shortened.
I think this solution is harder to read than an inline if
why?