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C# bool Keyword with Example
In this tutorial, we will learn about the bool keyword, its usage, memory size with example in C#.
By IncludeHelp Last updated : April 04, 2023
C# bool Keyword
The bool keyword used to declare a variable that can store Boolean values true or false. The bool keyword is an alias of System.Boolean.
It occupies 1 byte (8 bits) in the memory.
Syntax
bool variable_name = value;
There are only two possible values that can be assigned to a bool variable 1) true or 2) false
Example of bool keyword in C#
Here, we are declaring a bool variable answer, initializing it with the value true and printing its value, type, and size of a bool type variable.
using System;
using System.Text;
namespace Test {
class Program {
static void Main(string[] args) {
//variable declaration
ulong num = 12345;
//printing value
Console.WriteLine("num: " + num);
//printing type of variable
Console.WriteLine("Type of num: " + num.GetType());
//printing size
Console.WriteLine("Size of a ulong variable: " + sizeof(ulong));
//printing minimum & maximum value of ulong
Console.WriteLine("Min value of ulong: " + ulong.MinValue);
Console.WriteLine("Max value of ulong: " + ulong.MaxValue);
//hit ENTER to exit
Console.ReadLine();
}
}
}
Output
answer: True
Type of answer: System.Boolean
Size of a bool variable: 1
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