using System;

public class Program

{

    public static void Main()

    {

        //write program the takes number from the user and give the sum of natural number

        //Decl

        int i , input, sum = 0;

        Console.WriteLine("\n\n  ");

        Console.WriteLine("Display n term of natural and their sum\n ");

        Console.WriteLine("--------------------------------------------\n");

        Console.WriteLine("Please enter a number to get the sum of it (you will be hack)\n ");

        //input = Console.ReadLine();

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

        Console.WriteLine("\nThe first {0} natural number are: \n ", input);

        for ( i = 0; i <= input; i++  );

        {

            Console.WriteLine("{0}", i);

            sum += 1;   

        }

        Console.WriteLine("\nThe sum of the natural Number upto {0} term : {1}\n", input, sum);

    }

}