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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.
I see now... I was so focused on extracting the most significant digit, I didn't even consider I could make life easy by starting with the least significant digit.
I should have used num % 10 to find the least significant digit, then num/=10 would slot the next digit for extraction. :)