cc-validation

Credit Card Validator

• Credit Card Number Validation using Luhn Algorithm.

• Luhn Algorithm

  1. Starting from the end of the card number double the value of every second digit

  2. Subtracting 9 from any digit that is greater than 9

  3. Taking sum of all the digits

  4. If the modulo of the sum equal to 0 then the number is valid.

Installation

npm install cc-validation

Usage

var ccValidation = require("creditCardValidation");
var isValid = console.log(ccValidation.ccNumValidator("4111111111111111"));