Question

1. Write a program to input a 2-digit number and print
the sum and product of the digits. in java​

Answer 1

Answer:

import java.util.Scanner;

public class KboatSpecialNumber

{

   public void checkNumber() {

       

       Scanner in = new Scanner(System.in);

       

       System.out.print("Enter a 2 digit number: ");

       int orgNum = in.nextInt();

       

       int num = orgNum;

       

       int digit1 = num % 10;

       num /= 10;

       

       /*

        * If num becomes 0 after extracting first digit

        * it means that user entered a single digit number.

        * We should check for such invalid inputs.

        */

       if (num == 0) {

           System.out.println("Invalid input. Entered number is not a 2 digit number");

           System.exit(0);

       }

       

       int digit2 = num % 10;

       num /= 10;

       

       /*

        * If num does not become 0 after extracting second digit

        * it means that entered number has 3 or more digits.

        * We should check for such invalid inputs.

        */

       if (num != 0) {

           System.out.println("Invalid input. Entered number is not a 2 digit number");

           System.exit(0);

       }

       

       int digitSum = digit1 + digit2;

       int digitProduct = digit1 * digit2;

       

       if ((digitSum + digitProduct) == orgNum)

           System.out.println("Special 2-digit number");

       else

           System.out.println("Not a special 2-digit number");

           

   }

}

Explanation: