5 ms·
the digits you parse out of a credit card number are used in a numerical algorithm. That's not the same thing at all.
by jameshart 4y ago
the digits you parse out of a credit card number are used in a numerical algorithm. That's not the same thing at all.
- lucas_membrane 4y agoVehicle identification numbers, which follow an international standard, also have a check digit, even though they contain alphabetic characters.
- jameshart 4y agoISBN codes too - checksum is base 11 so can be represented by a digit 0-9 or an ‘X’ in the final place.