Main.java

import java.util.Scanner;
/**
 * Main
 */
public class Main {

    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter First Number: ");
        double num1=sc.nextDouble();
        System.out.println("Enter Second Number: ");
        double num2=sc.nextDouble();
        System.out.println("Choose Operation:");
        System.out.println("1.Addition (+)");
        System.out.println("2.Subtraction (-)");
        System.out.println("3.Multiplication (*)");
        System.out.println("4.Division (+)");
        System.out.print("Enter your choice (1-4): ");
        int choice=sc.nextInt();
        switch (choice) {
            case 1:
                System.out.println("Result = "+(num1+num2));
                break;

            case 2:
                System.out.println("Result = "+(num1-num2));
                break;
            
            case 3:
                System.out.println("Result = "+(num1*num2));
                break;

            case 4:
                if(num2!=0){
                     System.out.println("Result = " + (num1 / num2));
                }else{
                    System.out.println("Cannot divide by zero.");
                }
                break;
            default:
                System.out.println("Invalid Choice!");;
        }
        sc.close();
    }
}