Short Circuit Evaluation in Logical Operators.

Short-Circuiting in Logical Operators is an important concept to understand in programming in which the compiler skips the evaluation of sub-expressions in a Logical expression. The compiler does this because evaluating the remaining expression will cause no change in the overall result. 

Boolean AND (&&) and OR (||) logical operators perform short-circuit evaluation.

Short-circuit in case of AND (&&) operator: AND operator is used to combine two conditions together and the second condition is evaluated only when the first condition returns true. (alert-success)

Example: 

//C++ Example of Short Circuit AND Operators
#include<iostream>
using namespace std;

int main(){

    int a = 6, b = 2;

    bool check = (a < b) && (++b);
    cout<<"Expression is "<<check<<endl;
    cout<<"b = "<<b<<endl;

    return 0;
}

Expression is 0
b = 2

//C++ Example of Short Circuit OR Operators
#include<iostream>
using namespace std;

int main(){

    int a = 8, b = 2;

    bool check = (a > b) || (++b);
    cout<<"Expression is "<<check<<endl;
    cout<<"b = "<<b<<endl;

    return 0;
}

Expression is 1
b = 2