Question

write a java program to make a simple calculator using switch case​

Answer 1

Answer:

import java.util.Scanner;

public class Calculator

{

public static void main(String[] args)

{

   

 Scanner sc=new Scanner(System.in);

 System.out.println("Enter your choice : ");

 System.out.println("1. ADDITION");

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

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

 System.out.println("4. DIVISION");

 int n=sc.nextInt();

   

 System.out.println("ENTER FIRST NUMBER ");

 int a=sc.nextInt();

   

 System.out.println("ENTER SECOND NUMBER ");

 int b=sc.nextInt();

   

 double result=0;//'result' will store the result of operation

   

 switch(n)

 {

  case 1:

   result=a+b;

   break;

  case 2:

   result=a-b;

   break;

  case 3:

   result=a*b;

   break;

  case 4:

   if(b==0)//when denominator becomes zero

   {

    System.out.println("DIVISION NOT POSSIBLE");

    break;

   }

   else

    result=a/b;

   

  default:

   System.out.println("YOU HAVE ENTERED A WRONG CHOICE");

   

 }

   

 System.out.println("RESULT = "+result);

}

}

Explanation: