Question

16. write a program in java using a menu to add, subtract, multiply or divide 2 numbers

Answer 1

Answer:

Java Program to Calculate the Sum, Multiplication, Division and Subtraction of Two Numbers

public class Calculate.

int m, n, opt, add, sub, mul;

double div;

Scanner s = new Scanner(System.

System. out. print("Enter first number:");

m = s. nextInt();

System. out. print("Enter second number:");

n = s. nextInt();

Answer 2

$\texttt{\textsf{\large{\underline{Solution}:}}}$

The given program is solved using switch case.

import java.util.*;

public class MenuDriven{

   public static void main(String args[]){

       Scanner sc=new Scanner(System.in);

       int a,b,result=0;

       System.out.print("Enter first number: ");

       a=sc.nextInt();

       System.out.print("Enter second number: ");

       b=sc.nextInt();

       System.out.println("1. Addition.");

       System.out.println("2. Subtraction.");

       System.out.println("3. Multiplication.");

       System.out.println("4. Division.");

       System.out.println("5. Modulus.");

       System.out.print("\nEnter your choice: ");

       switch(sc.nextInt()){

           case 1:

           result=a+b;

           break;

           case 2:

           result=a-b;

           break;

           case 3:

           result=a*b;

           break;

           case 4:

           result=a/b;

           break;

           case 5:

           result=a%b;

           break;

           default:  

           System.out.println("Invalid Choice. Program Terminated.");

           System.exit(0);

       }

       System.out.println("Result is: "+result);

   }

}

Note: If the user enters an invalid choice, an error message will be shown and the program will be terminated.

See the attachment for output.