Linux: Comma separated arguments in an If Statement

 What happens when you write code like this:

    if ((x,y) == true) {

Is it even a legal condition to put in? If yes, why would you use it?

We have an example you could try out:

bash-4.1$ cat test.cc 

#include <iostream>

using namespace std;

int main() {

    int x = 1, y =0;

    if ((x,y) == true) {

        cout << “X TRUE PATH" << endl;

    } else {

        cout << “Y FALSE PATH" << endl;

    }

}

It turns out when you do this GCC will pick the last argument and run a comparison against it. So the answer is:

bash-4.1$ ./test 

Y FALSE PATH