bool Keyword in C# - GeeksforGeeks

Keywords are the words in a language that are used for some internal process or represent some predefined actions. bool is a keyword that is used to declare a variable which can store Boolean values true or false. It is an alias of System.Boolean.

Bool Keyword occupies 1 byte (8 bits) in the memory. There are only two possible values of bool i.e. true or false.

Syntax:

bool variable_name = value;

Example:

Input: true

Output: answer: False
        Size of a byte variable: 1

Input: false

Output: Type of answer: System.Boolean
        answer: True
        Size of a bool variable: 1

Example 1:

// C# program for bool keyword 
using System; 
using System.Text; 
   
    class GFG 
    { 
        static void Main(string[] args) 
        {  
            // bool variable declaration 
            bool answer = false; 
   
            // to print value 
            Console.WriteLine("answer: " + answer); 
  
            // to print size of a bool  
            Console.WriteLine("Size of a bool variable: " + sizeof(bool)); 
   
        } 
    } 

Output:

answer: False
Size of a bool variable: 1

Example 2:

// C# program for bool keyword 
using System; 
using System.Text; 
  
namespace geeks { 
  
class GFG { 
  
    static void Main(string[] args) 
    { 
        // bool variable declaration 
        bool answer = true; 
  
        // to print type of variable 
        Console.WriteLine("Type of answer: " + answer.GetType()); 
  
        // to print value 
        Console.WriteLine("answer: " + answer); 
  
        // to print size of a bool 
        Console.WriteLine("Size of a bool variable: " + sizeof(bool)); 
  
        // hit ENTER to exit 
        Console.ReadLine(); 
    } 
} 
} 

Output:

Type of answer: System.Boolean
answer: True
Size of a bool variable: 1

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