using System;

namespace ConsoleApp1
{
    internal class Program
    { 
        public static void Main(string[] args)
        {
            Console.WriteLine("Enter number: ");
            string userInput = Console.ReadLine();

            CheckNumber(userInput);
        }

        //CheckNumber()
        public static void CheckNumber(string stringNumber) {
            double doubleNumber;

            bool success = double.TryParse(stringNumber, out doubleNumber);

            if (success)
            {
                switch (doubleNumber % 2)
                {
                    case 0:
                        Console.WriteLine("Even number");
                        break;
                    case 1:
                        Console.WriteLine("Odd number");
                        break;
                }
            }
            else 
            {
                Console.WriteLine("Invalid Entry");
            }
        }
    }
}