Have you seen this?

N ^= 1

by Antmanx2

HTML

<ul id="demo">
</ul>

CSS

#demo{
  list-style: none;
}

JavaScript

for (a = 0; a <= 100; a++){
var curA = a;
var b = (curA ^= 1);
var text = "A= " + a + " Value= " +  b;
var element = document.getElementById("demo");
element.innerHTML += "<li>" + text + "</li>";
}