WAP to find out the number is negative or positive

 using System;

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace  Positive_negative
{
Class Program
{
static void main(string[] args)
{
double a;
Console.WriteLine("Input any number.");
a= Convert.ToDouble(Console.ReadLine());
if(a>0)
{
Console.WriteLine("The number is Positive.");
}
else
{
Console.WriteLine("The number is negative.");
}
Console.ReadLine();
}
}
}

OUTPUT:

Input any number.
5
The number is Positive.