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The following function takes an argument as Credit Card number and then validates the number using Luhn algorithm and returns its type. Currently, this PL/SQL function supports three kinds of the Credit Cards which are Visa, MasterCard, and American Express. You can modify to add more Credit Card types. Function CHECK_LUHN_ALGO to check the. Jul 19, 2022 · Step 3. Add all digits in the odd places from right to left in the card number. 6 + 6 + 0 + 8 + 0 + 7 + 8 + 3 = 38. Step 4. Sum the results from Step 2 and Step 3. 37 + 38 = 75. Step 5. If the result from Step 4 is divisible by 10, the card number is valid; otherwise, it is invalid..
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