using System;

public class Program

{

    public static void Main()

    {

        int i,n,sum=0;

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

    Console.Write("Display the sum of n odd natural number:\n");

    Console.Write("------------------------------------------");

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

​

   Console.Write("Input number of terms : ");

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

   Console.Write("\nThe odd numbers are :");

   for(i=1;i<=n;i++)

   {

     Console.Write("{0} ",2*i-1);

     sum+=2*i-1;

   }

   Console.Write("\nThe Sum of odd Natural Number upto {0} terms : {1} \n",n,sum);

    }

}