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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