We all use them, different places in our code, toggling variables.
And there are many ways to achieve the same results.
My first toggle looked like that. This toggles between 1 and -1.
a *= -1;
It then evolved to:
a = a XOR 1; // or a = a ^ 1 in Java
I also started using the modulus operator:
a = (a + 1) % 2;
Then I liked the modulus operator so much, that I started using it to toggle between three, four or N values:
a = (a + 1) % 4;
