Starting from the right side of the string, take every alternating digit and multiply it by 2. These are the steps that you need to follow to manually check the validity of any card number against the Luhn algorithm. To understand the working of the algorithm, let’s take a random card number as an example i.e.: You could do it in a couple of minutes using a pen and paper…if you wanted to. ![]() It may sound complicated but running the Luhn algorithm on any set of numbers isn’t actually that hard. How to Manually Check the Validity of a Credit Card Number Using the Luhn Algorithm
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |