Luhn Algorithm
The Luhn algorithm is a simple checksum formula used to validate a variety of identification numbers, most notably credit card numbers. It works by applying a mathematical calculation to the digits of a number to detect errors like single-digit mistakes or adjacent digit transpositions. Developed by Hans Peter Luhn in 1954, it is widely implemented in systems requiring basic error detection.
Developers should learn the Luhn algorithm when building applications that handle payment processing, identity verification, or any system requiring input validation for numeric identifiers. It is essential for ensuring data integrity in financial transactions, such as validating credit card numbers before processing payments, and is commonly used in e-commerce platforms and banking software. Understanding this algorithm helps prevent errors and fraud in sensitive data handling.