practica 6.2 consola

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace PRACTICA_6._2_CONSOLE
{
class Program
{
static void Main(string[] args)
{
double n, i, suma = 0;

Console.WriteLine("\n\nINTRODUCE UN NUMERO");
n = double.Parse(Console.ReadLine());
for (i = 1; i <= n; i = i + 2)
{
suma = suma + i;
}
Console.WriteLine("\n\nLA SUMA DE LOS IMPARES ES: {0} ", suma);
Console.ReadLine();
}
}
}