ProductOfThreeSign

using System;

class productOfThreeSign
{
    static void Main(string[] args)
    {
        Console.WriteLine("Please enter first number:");
        int firstNumber;
        int.TryParse(Console.ReadLine(), out firstNumber);
        Console.WriteLine("Please enter second number: ");
        int secondNumber;
        int.TryParse(Console.ReadLine(), out secondNumber);
        Console.WriteLine("Please enter third number: ");
        int thirdNumber;
        int.TryParse(Console.ReadLine(), out thirdNumber);
        string outputMessage = "";

        if (firstNumber > 0 && secondNumber > 0 && thirdNumber > 0)
        {
            outputMessage = "The product of the three real numbers is with sign \"+\" (e.g. It's a positive number)";
        }
        else if (firstNumber < 0 && secondNumber > 0 && thirdNumber > 0)
        {
            outputMessage = "The product of the three real numbers is with sign \"-\" (e.g. It's a positive number)";
        }
        else if (firstNumber < 0 && secondNumber < 0 && thirdNumber > 0)
        {
            outputMessage = "The product of the three real numbers is with sign \"+\" (e.g. It's a positive number)";
        }
        else if (firstNumber < 0 && secondNumber < 0 && thirdNumber < 0)
        {
            outputMessage = "The product of the three real numbers is with sign \"-\" (e.g. It's a positive number)";
        }
        else if (firstNumber > 0 && secondNumber < 0 && thirdNumber > 0)
        {
            outputMessage = "The product of the three real numbers is with sign \"-\" (e.g. It's a positive number)";
        }
        else if (firstNumber > 0 && secondNumber < 0 && thirdNumber < 0)
        {
            outputMessage = "The product of the three real numbers is with sign \"+\" (e.g. It's a positive number)";
        }
        else if (firstNumber > 0 && secondNumber > 0 && thirdNumber < 0)
        {
            outputMessage = "The product of the three real numbers is with sign \"-\" (e.g. It's a positive number)";
        }
        else if (firstNumber < 0 && secondNumber > 0 && thirdNumber < 0)
        {
            outputMessage = "The product of the three real numbers is with sign \"+\" (e.g. It's a positive number)";
        }
        else
        {
            outputMessage = "Please Enter Only NumbersAnd Different from 0";
        }

        Console.WriteLine(outputMessage);
    }
}