![]() ![]() The length is in between 13 to 19 characters and contains only numbers and no space in between. Example: 18-digit number without Luhn Check Digit: 872560021439746445. Make sure that the Credit Card or Debit Card Number follows the proper format. If one character is mistyped, the Luhn algorithm can detect it. The below functions can be called in a Connect data mapping configuration, template and output presets to calculate the Luhn Check digit, to return the full code as well as for verifying whether a code satisfies the Luhn Algorithm. This algorithm allows checking credit card numbers MasterCard/AMEX/Visa or IMEI codes for example by using a control key checksum. The Luhn algorithm (also called modulo 10 or mod 10) is a checksum formula for numbers/digits used with credit card.
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