Question

Write a program to validate Canadian Postal Codes. A postal code must follow the pattern of L9L9L9 where:

• L is a letter
• 9 is a digit

Your program should continue accepting postal codes until the user enters the word “exit”.

Sample run (user input is shown in bold underline):

Enter a postal code: T2T-3X7

Postal code wrong length, format L9L9L9

Enter a postal code: T2T3AA

Postal code has letters where there are supposed to be digits

Enter a postal code: T2T358

Postal code has digits where there are supposed to be letters

Enter a postal code: T2T3A8

Postal code is valid!

Enter a postal code: exit

please answer in java

Answer 1

PLEASE GIVE IT A THUMBS UP, I SERIOUSLY NEED ONE, IF YOU NEED ANY MODIFICATION THEN LET ME KNOW, I WILL DO IT FOR YOU

import java.util.Scanner;

class Main {

  public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    String choice = "yes";
    //loops until the choice is exit
    while (!choice.equals("exit")) {
      //Ask user for postal code
      System.out.print("Enter postal code: ");
      String code = s.next();

      //Find length of code
      int len = code.length();

      if (len != 6) {
        System.out.println("Postal code wrong length, format L9L9L9");
      } else {
        int letter = 0;
        int digit = 0;
        for (int i = 0; i < len; i++) {
          //Check if char is letter
          if (!Character.isDigit(code.charAt(i))) {
            letter++;
          }
          //Check if char is digit
          if (Character.isDigit(code.charAt(i))) {
            digit++;
          }
        }

        //Check as per validation rules defined
        if (letter == 3 && digit == 3) {
          System.out.println("Postal code is valid!");
        } else if (letter < 3 && digit > 3) {
          System.out.println(
            "Postal code has digits where there are supposed to be letters"
          );
        } else if (letter > 3 && digit < 3) {
          System.out.println(
            "Postal code has letters where there are supposed to be digits"
          );
        }
      }
      System.out.print("Want to enter more postal code, yes/exit: ");
      choice = s.next();
    }
  }
}