Bool Data Type In C++ | Bool Data Type In C++ Programming Language

Bool data type in C++

The ISO/ANSI C++ Standard has added certain new data types to the original C++ specifications.They are provided to provide better control in certain situations as well as for providing conveniences to C++ programmers.

One of the new data type is: bool

Fig: Bool Data Type In C++ 

Syntax:

bool b1=true   //declaration  a boolean  with a true value

The data type bool has been introduced to hold a boolean value, true or false.The values true or false have been added as keywords in the C++ language.

Important Points:

 

·         The default numeric value of true is 1 and false is 0.

 

·         We can use bool type variables or values true and false in mathematical expressions also.

 

·         It is also possible to convert implicitly the data type integers or floating point values to bool type.

 

Program:

 

#include<iostream>

using namespace std;

int main()

{

       int x1 = 10, x2 = 20, m = 2;

       bool b1, b2;

       b1 = x1 == x2; // false

      

       b2 = x1 < x2; // true

      

       cout << "b1 is = " << b1 << "\n";

       cout << "b2 is = " << b2 << "\n";

       bool b3 = true;

      

       if (b3)

                 cout << "Yes" << "\n";

       else

                 cout << "No" << "\n";

                

       int x3 = false + 5 * m - b3;

       cout << x3;

      

return 0;

      

}

 

 

Output:

 

b1=0

b2=1

yes

9