Logical operators short-circuiting

• Expressions connected by && or || are evaluated left to right.

• Evaluation stops as soon as the truth or falsehood of the result is known. This feature is known as short-circuiting.

void main()
{
    int x = 1;
    int y = 2;
    if ( x == y && y > 0 ) {
        // execution nevert gets here...
    }
    // expr y > 0 never evaluated!
    if ( x == 1 || y == 2 ) {
        // expr y == 2 never evaluated!
        // ...
    }
}