Ever wanted to check the genuineness of any credit card number ?
Well, you can easily verify the genuineness of any credit card number, by using a simple math,
The credit card numbers are not randomly selected, but it follows a specific rule named (Luhn algorithm) which could be used to cross-check that whether a credit card is valid or not.
Procedure for validating the credit card manually :
- First of all write the number of the credit card which you want to verify,
- Then double the alternate digits, starting from the 2nd number (from right). Note each down to the original credit-card number, and put a cross mark on the left numbers / digits.
- If you get any number with 2 digits, while doubling the alternate numbers in Step 2 (Provided above), then add those 2 digits together to make it as a single one. For example, if you doubled 6 to get 12. Make it 3 (By adding 2 and 1 – 2+1).
- Then add the uncrossed digits all-together.
If final sum ends as zero, then it is a valid credit card number, otherwise it is fake.
You can also check the demo-interaction as provided below, which shows the detection of a fake credit-card by the simple method as I told above.
If you get some problem while understanding this method, then post it in comment-box provided below.