overload )) I thought the fork was removed ))

So, you fork a Kumite titled "...without converting to string", and put a string conversion in the code..

Perhaps fork one of the ones that have done this predictable, inefficient approach to death..

You don't really need number of digits for this; you can just repeatedly divide the input number by 10 on each loop until it hits zero (or mods to 3)

If you're going to do this you don't need the ToCharArray or the ToList; LINQ will operate on a string as if it were a sequence of chars

Nice!

Very cool!

sorry