using System;

public class Exercise5

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        int num1,num2,temp;

        Console.WriteLine("\ninput the first number");

        num1=int.Parse(Console.ReadLine());

        Console.WriteLine("\ninput the Second number");

        num2=int.Parse(Console.ReadLine());

        temp=num1;

        num1=num2;

        Console.WriteLine("\nafter swapping");

        Console.WriteLine("\nfirst number"+num1);

        Console.WriteLine("\nsecond   number"+num2);

    }

    }

​