Card Validator - calculation to compare a credit card number with your checks
calculation to compare a credit card number with your checks
Here is the first step to use it Just enter the last digit of your credit card number. You know this is the digit of the checksum you will use to verify it later to check our rest of credit card. Check website for second and last step.
This is posted on Steemhunt - A place where you can dig products and earn STEEM.
View on Steemhunt.com