Java program to make simple calculator

In this post, we will see how to create a simple calculator in java.
This calculator program performs 4 basic operatios – Addition, Substraction, Multiplication and division.It uses Switch case to choose operation you want to perform.

import java.util.Scanner;

public class Calculator
{
    public static void main(String args[])
    {
        float num1, num2, result;
        char operation, ch;
        Scanner scan = new Scanner(System.in);

        do
        {
            System.out.print("1. Addition\n");
            System.out.print("2. Subtraction\n");
            System.out.print("3. Multiplication\n");
            System.out.print("4. Division\n");
            System.out.print("5. Exit\n\n");
            System.out.print("Enter your operation : ");
            operation = scan.next().charAt(0);
            switch(operation)
            {
                case '1' : System.out.print("Enter Two Number : ");
                    num1 = scan.nextFloat();
                    num2 = scan.nextFloat();
                    result = num1 + num2;
                    System.out.print("Addition of numbers is " + result);
                    break;
                case '2' : System.out.print("Enter Two Number : ");
                    num1 = scan.nextFloat();
                    num2 = scan.nextFloat();
                    result = num1 - num2;
                    System.out.print("Subtraction of numbers is " + result);
                    break;
                case '3' : System.out.print("Enter Two Number : ");
                    num1 = scan.nextFloat();
                    num2 = scan.nextFloat();
                    result = num1 * num2;
                    System.out.print("Multiplication of numbers is " + result);
                    break;
                case '4' : System.out.print("Enter Two Number : ");
                    num1 = scan.nextFloat();
                    num2 = scan.nextFloat();
                    result = num1 / num2;
                    System.out.print("Division of numbers is " + result);
                    break;
                case '5' : System.exit(0);
                    break;
                default : System.out.print("Wrong operation!!!");
                    break;
            }
            System.out.print("\n---------------------------------------\n");
        }while(operation != 5);       
    }
}

Output:

That’s all about java program to make simple calculator.