Loading collection data...
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.
Very smart lol
This comment is hidden because it contains spoiler information about the solution
str has assigned as an empty string in the first line of code, and it won't go in to the for loop when 1 <= 0. So it'll directly return ""
Readable code for beginner level!