CS Java Methods Question:
A).
Credit card numbers follow certain patterns. A credit cardnumber must have between 13 and 16 digits. It must start with:
4 for Visa cards
5 for Master cards
37 for American Express cards
6 for Discover cards
In 1954, Hans Luhn of IBM proposed an algorithm for validatingcredit card numbers. The algorithm is useful to determine if a cardnumber is entered correctly or if a credit card is scannedcorrectly by a scanner. Almost all credit card numbers aregenerated following this validity check, commonly known as the Luhncheck or the Mod 10 check, which can be described as follows
OR
PayPal Gateway not configured
OR
PayPal Gateway not configured