C program for luhn algorithm9/16/2023 ![]() ![]() The final digits of your credit card number is a check digit, akin to a checksum. If it does, then the credit number is deemed valid. ![]() The way it does so is by applying a series of computations to the credit card number given, adding up the results of those computations, and checking whether the resulting number matches the expected result. Many examples helped us understand how to fix the Luhn Algorithm Javascript error. * Luhn algorithm in JavaScript: validate credit card number supplied as string of numbers The solution to the previously mentioned problem, Luhn Algorithm Javascript, can also be found in a different method, which will be discussed further down with some code examples. Let sum = array.reduce((prevVal, curVal, index) => (index % 2 != 0 ? prevVal + curVal : prevVal + ((curVal *= 2) > 9 ? curVal - 9 : curVal)), 0) Var num = document.getElementById("cardNum").value ![]() Check if the above number passes the Luhn Algorithm ![]()
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