Exercise-5 : Design and Write a simple java class program which can perform all basic operation of a Calculator. Define necessary instance variable but do not use method.

import java.util.Scanner;

public class Ex1 {
   
    public static void main(String[] args) {
      Scanner input = new Scanner(System.in);
       int a,b,sum;
      
       System.out.println("plz enter a digit ");
       
       a = input.nextInt();
       b = input.nextInt();     
      
      sum = a+b;
      System.out.println("addition result " +sum);
     
      sum = a-b;
      System.out.println("addition result " +sum);     
     
      sum = a*b;
      System.out.println("addition result " +sum);
     
      sum = a/b;
      System.out.println("addition result " +sum);
   
    }
   
}