Most elegant way to change 0 to 1 and vice versa

Question

What is the most elegant way to do the next stuff:

int i = oneOrZero;

if (i == 0) {
   i = 1;
} else {
   i = 0;
}

You can assume that

Answer 1

i ^= 1;

XOR the value with 1. This gives you both ways (in case you need to flip 0 <--> 1 either way):

0 ^ 1 = 1
1 ^ 1 = 0