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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.
Because the reply is coming as a string, and the condition is that first character is always a number. Thus you want only the first character exported from the given string.
you have a mathematical mind
could you explain why you use [0]?