Credit Card Validator (Go) A simple Go program to validate credit card numbers using the Luhn algorithm. Features Validates credit card numbers against the Luhn algorithm. Identifies common card types (Visa, MasterCard, Amex, Discover, JCB). Provides clear validation results. Project Screenshots Sample Card Numbers to Test with Valid Card Numbers (Pass Luhn Check) Card Type Number Visa 4111111111111111 MasterCard 5555555555554444 Amex 378282246310005 Discover 6011111111111117 JCB 3530111333300000 Invalid Card Numbers (Fail Luhn Check) Description Number Wrong checksum 4111111111111121 Short 12345678 All zeros 0000000000000000 Random digits 9876543210123456