Credit card details are frequently used online and you may be wondering how a website checks if a card number is legitimate or not. During my CodeAcademy “Back-End Engineer” I have tackled the Credit Card Checker project which involves using the Luhn algorithm to check credit card numbers. Quoting Wikipedia (https://en.wikipedia.org/wiki/Luhn_algorithm#Description): “Each of the numbers … Continue reading Credit Card Number Checker (JavaScript)