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form validation for my card number using modulus. i need to add this code to my jscode not on html script. and add it to formhaserror function.
Modulus Check Logic
For this project, we will be taking in 10 digit credit card numbers. Ensure the user entered only 10 numbers. If they pass this check, perform a modulus check to ensure that the user has submitted a valid credit card number.
Note that the checking factors below are the literal checking factors you will use in your solution.
Sample Credit Card Number
9434578423
Checking Factors
432765432
Multiply Checking Factors by Credit Card digits and Sum
(9 * 4) + (4 * 3) + (3 * 2) + (4 * 7) + (5 * 6) + (7 * 5) + (8 * 4) + (4 * 3) + (2 * 2) = 195
Divide the Sum by 11
195 / 11 = 17, gives a remainder of 8
Subtract
11 - 8 = 3 (this is the check digit)
Compare the check digit to the last digit in the credit card number
9434578423
The credit card number is valid when the check digit and the last digit in the credit card number are equal.
The following valid credit card numbers can be used for testing:
1111111118
2222222225
4111313135
2234321326
Note:
The "%" is the mathematical operator used to get the remainder.
Examples:
10 % 5 = 0, there is no remainder
10 % 3 = 1, there is a remainder of 1
here is the whole folder for the precode.
https://drive.google.com/file/d/1VdEXWjabTtcfNKN7zjm4kCRvB80mVQJw/view?usp=share_link
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