write C# console app No arrays
Credit card validation Problem. A credit card number must bebetween 13 and 16 digits. It must start with: –4 for visa cards –5for mater cards –37 for American express cards –6 for discovercards •Consider a credit card number 4380556218442727 •Step1:double every second digit from right to left. If doubling of adigit results in a two-digit number, add up the two digits to get asingle-digit number. •Step2: now add all the single digit numbersfrom step1 4 + 4 + 8 + 2 + 3 + 1 + 7 + 8 •Step3: add all digits inthe odd places from right to left in the card number 7+ 7 + 4 + 8 +2 + 5 + 0 + 3 = 36 •Step4: sum the results from step 2 and step 337 + 36 = 73 •Step 5: if the results from step 4 is divisible by10, the card number is valid; otherwise, it is invalid. In thiscase, the card number is not valid – because 75 not divisible by10. use modulus operator
