Positive, negative or zero

Given a number, write a method that checks if it is positive, negative or zero.
Expected input and output
PositiveNegativeOrZero(5.24) → positive PositiveNegativeOrZero(0.0) → zero PositiveNegativeOrZero(-994.53) → negative
using System;

namespace CSharpExercises.Exercises.Conditional_statements
{
    class PositiveNegativeOrZeroTask
    {
        static string PositiveNegativeOrZero(double num)
        {
            if (num > 0.0)
            {
                return "Positive";
            }
            else if (num < 0.0)
            {
                return "Negative";
            }

            return "Zero";
        }

        static void Main(string[] args)
        {
            Console.WriteLine(PositiveNegativeOrZero(3.14)); // Positive
            Console.WriteLine(PositiveNegativeOrZero(0.0)); // Zero
            Console.WriteLine(PositiveNegativeOrZero(-200.003)); // Negative
        }
    }
}