Lesson #2

namespace MyNamespace
{
    class Program
    {
        static void Main(string[] args)
        {
            // The first is check condition then operations
            while (true) // boolean expression
            {
                break;
            }

            // The first is to do operations and then check condition
            do
            {
                break;
            } while (true); // boolean expression

            int a = 3;
            switch (a)
            {
                case 1: System.Console.WriteLine("CASE #1"); break;
                case 2: System.Console.WriteLine("CASE #2"); break;
                case 3:
                    System.Console.WriteLine("CASE #3");
                    System.Console.WriteLine("CASE #4");
                    break;
                default: System.Console.WriteLine("DEFAULT"); break;
            }
        }
    }
}