4 ms·
Check validity of credit card number (Luhn’s algorithm)
- taf2 14y agoanyone able to confirm - is this going to work with all major credit cards?
- antiterra 14y agoYes, this is how it works with all major credit cards as well as many gift cards. You can also find ISO/IEC 7813, the track data standard, on Wikipedia. However, if you're thinking of programming some kind of payment engine, I urge you to carefully research the security and liability issues you are likely to encounter.
- taf2 14y agothanks, no - no interest just figure this looks simple enough to add as a extra layer of validation before sending card data over the wire... This example, looks pretty straight forward: https://sites.google.com/site/abapexamples/javascript/luhn-validation https://sites.google.com/site/abapexamples/javascript/luhn-v...
- hardhead 14y agoDuring the mid-90s, a high school math teacher gave me extra credit for presenting my class a slight variation of this CC verification algorithm, thus providing a real-world application showing modulo math to be relevant.