using System;

public class Program

{

    public static void Main()

    {

    int N1;

int N2;

int Total=0;

int option=0;

Console.WriteLine("Enter the first Number");

N1=Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Enter the second Number");

N2=Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Enter the option-1=Add 2=subtract 3=times 4=divide");

option=Convert.ToInt32(Console.ReadLine());

if(option==1){

Total=N1+N2;}

if(option==2){

Total=N1-N2;}

if(option==3){

Total=N1*N2;}

if(option==4){

Total=N1/N2;}

Console.WriteLine("the result is: "+Total);

​

    }

}