Computer Science > STUDY GUIDE > (PYTHON)Credit card number validation ProgramCredit card numbers f. (All)

(PYTHON)Credit card number validation ProgramCredit card numbers f.

Document Content and Description Below

(PYTHON)Credit card number validation Program Credit card numbers follow certain patterns: It must have between 13 and 16 digits, and the number must start with: 4 for Visa cards 5 for MasterCard... credit cards 37 for American Express cards 6 for Discover cards In 1954, Hans Luhn of IBM proposed an algorithm for validating credit card numbers. The algorithm is useful to determine whether a card number is entered correctly or whether a credit card is scanned correctly by a scanner. Credit card numbers are generated following this validity check, commonly known as the Luhn check or the Mod 10 check, which can be described as follows (for illustration, consider the card number 4388576018402626): 1. Double every second digit from right to left. If doubling of a digit results in a two-digit number, add up the two digits to get a single-digit number. 2. Now add all single-digit numbers from Step 1. 4 + 4 + 8 + 2 + 3 + 1 + 7 + 8 = 37 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 4. Sum the results from Steps 2 and 3. 37 + 38 = 75 https://www.coursehero.com/file/49240756/PYTHONCredit-card-number-validation-ProgramCredit-card-numbers-fdocx/ This study resource was shared via CourseHero.com5. If the result from Step 4 is divisible by 10, the card number is valid; otherwise, it is invalid. For example, the number 4388576018402626 is invalid, but the number 4388576018410707 is valid. [Show More]

Last updated: 2 years ago

Preview 1 out of 6 pages

Buy Now

Instant download

We Accept: