IntroC#_types_variables_operators_console_if_2a

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HelloWorld2a
{
    class Program
    {
        static void Main(string[] args)
        {
            int age = -128;
            double money = 2.54D;
            char firstLetter = 'S'; // '\u000f';
            bool isMail = true;
           // int 2f1dhgf = 12; ERROR can not start with number
            string name = "Stoyan";
            object myObject = 5;

            bool pr = (1 + 2) * 8 % 4 > (23 + 45) % 34;

            Console.WriteLine("Please enetr your age?");
            string input = Console.ReadLine();
            int parsed = int.Parse(input);
            Console.WriteLine("You have entered: {1} {0}", ++parsed, age);

            Console.WriteLine("Hello World! And I am " + age + " years old!");
            Console.WriteLine("I have in my pocket : " + money);
            Console.WriteLine("The first letter of my name is: " + firstLetter);
            Console.WriteLine("Am I a man? : " + isMail);
            Console.WriteLine("My Name is " + name);
            Console.WriteLine("Result: " + pr);

            if (parsed < 20)
            {
                Console.WriteLine("You are an teenager!");
            }
            else if (parsed >= 20 && parsed <= 30)
            {
                Console.WriteLine("You are in a briliant stage of your life the! It is time for fun");
            }
            else if (parsed > 30 && parsed <= 40)
            {
                Console.WriteLine("Its time for a family life");
            }
            else {
                Console.WriteLine("You are an old man");
            }

            switch (parsed) {
                case 21 :
                case 20 :
                    Console.WriteLine("switch You are in perfect age!");
                    break;
                case 50:
                    Console.WriteLine("switch You are in the middle of your life");
                    break;
                default :
                    Console.WriteLine("switch I don't know what to say");
                    break;
            }

        }
    }
}