Luhn algorithm - Validate code number

Validate a code number using the Luhn algorithm.

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The Luhn algorithm, a simple checksum verification algorithm, is also known as Luhn formula, modulus 10 algorithm, or mod 10 algorithm. It is most notably used to validate credit card numbers and IMEI phone identification numbers.

enter numbers only, including check digit
 
calculated, without trailing check digit
calculated

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