Age - C# Fundamentals

using System;

namespace demo
{
    class Program
    {
        static void Main(string[] args)
        {
            int age = int.Parse(Console.ReadLine());

            string output = string.Empty;
            if (0 >= age || age <= 2)
            {
                output = "baby";
            }

            else if (3 >= age || age <= 13)
            {
                output = "child";
            }

            else if (14 >= age || age <= 19)
            {
                output = "teenager";
            }

            else if (20 >= age || age <= 65)
            {
                output = "adult";
            }

            else if (age >= 66)
            {
                output = "elder";
            }

            Console.WriteLine(output);
        }
    }
}