Method first_check

Credit_Card_Validator.py:37–43

(self)

        return "Company : " + comp

    def first_check(self):
        if 13 <= len(self.card_no) <= 19:
            message = "First check : Valid in terms of length."

        else:
            message = "First check : Check Card number once again it must be of 13 or 16 digits long."
        return message

    def validate(self):
        # double every second digit from right to left