Java program for Calculator | Core Java Programs

 

Java Program for Calculator - This program will read two integer numbers and calculate the arithmetic operators, in this example we used switch case and if else statement. User will enter a choice after entering two numbers and based on user choice program will return the result.

/*Java program for Calculator*/

 

import java.util.*;

 

public class Calculator{

 

     public static void main(String []args){

         int a,b,choice;

         float result=0;

         /*scanner class object to read values*/

         Scanner buf=new Scanner(System.in);

         

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

         a=buf.nextInt();

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

         b=buf.nextInt();

         

         System.out.print("\n1: Addition.\n2: Subtraction.");

         System.out.print("\n3: Multiplication.\n4: Divide.");

         System.out.print("\n5: Remainder.\n6: Exit.");

         

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

         choice=buf.nextInt();

         

         switch(choice)

         {

             case 1:

                 result=(a+b); break;

             case 2:

                 result=(a-b); break;

             case 3:

                 result=(a*b); break;

             case 4:

                 result=(float)((float)a/(float)b); break;

             case 5:

                 result=(a%b); break;

             default:

                 System.out.println("An Invalid Choice!!!\n");

         }

         if(choice>=1 && choice<=5)

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

         

     }

}