Different behaviour of comma operator in C++ with return?

Question

This (note the comma operator):

#include 
int main() {
    int x;
    x = 2, 3;
    std::cout << x << \"\\n\";
    r         


        

Answer 1

Try to apply the simplistic approach just highlighting the precedence with parenthesis:

( x = 2 ), 3;

return ( 2, 3 );

Now we can see the binary operator "," working in the same way on both, from left to right.