bool Data Type in C++

While making decisions, it is human to think in terms of true or false. In C Programming language false is represented by Zero value and true by Non-Zero. C++ introduced bool data type to hold true or false values.

Code example :

#include <iostream>

using namespace std;

int main()

{

    int x=10,y=20;

    bool b=x>y;

    cout<<" x> y = "<<b<<endl;

    return 0;

}

On execution :

Even though  we can use keywords : true or false for assigning purposes to bool variable, the values stored in a bool variable for true is 1 and false is 0.

bool b=true;

cout<<b<<endl;

The outcome is 1.

std::boolalpha function can be used for text values for bool type.  With boolalpha, cout statement will look like :

    cout<<" x> y = "<<std::boolalpha<<b<<endl; 

On execution :



boolalpha is a format flag...