Csharp/C Sharp/Data Types/bool

A static method that returns a Boolean value.

 
using System;
class MainClass{
    public static Boolean TestInput(int val) {
        if (val < 1 || val > 10)
            return false;
        return true;
    }
    public static void Main() {
        Console.WriteLine("TestInput(0) = {0}", TestInput(0));
        Console.WriteLine("TestInput(1) = {0}", TestInput(1));
        Console.WriteLine("TestInput(5) = {0}", TestInput(5));
        Console.WriteLine("TestInput(11) = {0}", TestInput(11));
    }
}

bool FalseString, TrueString

 
using System;
using System.Collections.Generic;
using System.Text;
class Program {
    static void Main(string[] args) {
        bool b3 = true;    // No problem.
        bool b4 = false;   // No problem.
        Console.WriteLine("-> bool.FalseString: {0}", bool.FalseString);
        Console.WriteLine("-> bool.TrueString: {0}", bool.TrueString);
    }
}

bool variable

 
using System;
class Operators {
    static void Main() {
        bool a = 4 > 5;
        Console.WriteLine("{0}", a);
    }
}

Demonstrate bool values

/*
C#: The Complete Reference 
by Herbert Schildt 
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Demonstrate bool values. 
 
using System; 
 
public class BoolDemo { 
  public static void Main() { 
    bool b; 
 
    b = false; 
    Console.WriteLine("b is " + b); 
    b = true; 
    Console.WriteLine("b is " + b); 
 
    // a bool value can control the if statement 
    if(b) Console.WriteLine("This is executed."); 
 
    b = false; 
    if(b) Console.WriteLine("This is not executed."); 
 
    // outcome of a relational operator is a bool value 
    Console.WriteLine("10 > 9 is " + (10 > 9)); 
  } 
}

Print a truth table for the logical operators

/*
C# A Beginner"s Guide
By Schildt
Publisher: Osborne McGraw-Hill
ISBN: 0072133295
*/
/* 
   Project 2-2 
 
   Print a truth table for the logical operators. 
*/ 
 
using System; 
 
public class LogicalOpTable {    
  public static void Main() {    
 
    bool p, q; 
 
    Console.WriteLine("P\tQ\tAND\tOR\tXOR\tNOT"); 
 
    p = true; q = true; 
    Console.Write(p + "\t" + q +"\t"); 
    Console.Write((p&q) + "\t" + (p|q) + "\t"); 
    Console.WriteLine((p^q) + "\t" + (!p)); 
 
    p = true; q = false; 
    Console.Write(p + "\t" + q +"\t"); 
    Console.Write((p&q) + "\t" + (p|q) + "\t"); 
    Console.WriteLine((p^q) + "\t" + (!p)); 
 
    p = false; q = true; 
    Console.Write(p + "\t" + q +"\t"); 
    Console.Write((p&q) + "\t" + (p|q) + "\t"); 
    Console.WriteLine((p^q) + "\t" + (!p)); 
 
    p = false; q = false; 
    Console.Write(p + "\t" + q +"\t"); 
    Console.Write((p&q) + "\t" + (p|q) + "\t"); 
    Console.WriteLine((p^q) + "\t" + (!p)); 
  }    
}

Using Bool

/*
 * C# Programmers Pocket Consultant
 * Author: Gregory S. MacBeth
 * Email: gmacbeth@comporium.net
 * Create Date: June 27, 2003
 * Last Modified Date:
 * Version: 1
 */
using System;
namespace Client.Chapter_1___Common_Type_System
{
  public class UsingBoolChapter_1___Common_Type_System {
    static void Main(string[] args)
    {
      bool MyBool = false;
      if (MyBool)
      {
        Console.WriteLine(MyBool);
      }
      else
      {
        Console.WriteLine(MyBool);
      }
    }
  }
}