savageideas


Member since 08/02/2006

Location: Nashville, TN

Website: www.savageideas.com

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Uses the Luhn formula to quickly validate a credit card. Basically all the digits except for the last one are summed together and the output is a single digit (0 to 9). This digit is compared with the last digit ensure a proper credit card number is...
2 150 posted 13 years ago by savageideas
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