using System;

​

public class Program

{

    static void Prt(String s)

    {

        Console.WriteLine(s);

    }

​

    static bool Test1(int val)

    {

        Console.WriteLine("Test1(" + val + ")");

        Console.WriteLine("result: " + (val < 1));

        return val < 1;

    }

​

    static bool Test2(int val)

    {

        Console.WriteLine("Test2(" + val + ")");

        Console.WriteLine("result: " + (val < 2));

        return val < 2;

    }

​

    static bool Test3(int val)

    {

        Console.WriteLine("Test3(" + val + ")");

        Console.WriteLine("result: " + (val < 3));

        return val < 3;

    }

​

    public static void Main()

    {

        Random rand = new Random();

        for (int i = 0; i < 100; i++) {

        char c = (char)(rand.Next('a','z' + 1));

        Console.WriteLine(c + ": ");

        switch (c) {

        case 'a':

        case 'e':

        case 'i':

        case 'o':

        case 'u':

        Console.WriteLine("vowel");

        break;

        case 'y':

        Console.WriteLine("Sometimes a vowel");

        break;

        default:

        Console.WriteLine("consonant");

        break;

        for (char c = (char)0; c < (char)128; c++)

        {

            if (c != 26) // ANSI Clear screen

            {

                Console.WriteLine("value: " + (int)c + " character: " + c);

            }

        }

​

        Random rand1 = new Random();

        double r = 0;

        while (r < 0.99d)

        {

            r = rand1.NextDouble();

            Console.WriteLine(r);

        }

​

        if (Test1(0) && Test2(2) && Test3(2))

        {

            Console.WriteLine("expression is true");

        }

        else

        {

            Console.WriteLine("expression is false");

        }

​

        Random rand = new Random();

        int i = rand.Next(100);

        int j = rand.Next(100);

        Prt("i = " + i);

        Prt("j = " + j);

        Prt("i > j is " + (i > j));

        Prt("i < j is " + (i < j));

        Prt("i >= j is " + (i >= j));

        Prt("i <= j is " + (i <= j));

        Prt("i == j is " + (i == j));

        Prt("i != j is " + (i != j));

        // Treating an int as a boolean is

        // not legal C#

        //! Prt("i && j is " + (i && j));

        //! Prt("i || j is " + (i || j));

        //! Prt("!i is " + !i);

        Prt("(i < 10) && (j < 10) is " + ((i < 10) && (j < 10)));

        Prt("(i < 10) || (j < 10) is " + ((i < 10) || (j < 10)));

    }

}