Luhn algorithm: Difference between revisions

Revision as of 20:51, 15 August 2023

Revision as of 11:19, 31 August 2023

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=== Example for validating check digit ===

# Drop the check digit (last digit) of the number to validate. (e.g. 7992739871379927398714 -> 7992739871)

# Calculate the check digit (see above)

# Compare your result with the original check digit. If both numbers match, the result is valid. (e.g.<math>(givenCheckDigit = calculatedCheckDigit) \Leftrightarrow (isValidCheckDigit)</math>).