Luhn algorithm: Difference between revisions

Revision as of 18:54, 11 October 2023

Revision as of 04:56, 12 October 2023

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=== Example for validating check digit ===

# Drop the check digit (last digit) of the number to validate. (e.g. 17893729974 ->→ 1789372997)

# Calculate the check digit (see above)

# Compare your result with the original check digit. If both numbers match, the result is valid. {{nowrap|1=(e.g.<math> (givenCheckDigit = calculatedCheckDigit) \Leftrightarrow&hArr; (isValidCheckDigit)</math>).}}

==Strengths and weaknesses==