<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Booleans</h2>
<p>布尔值只有两个值：true 或 false。</p>
<p id="demo"></p>
<script>
var x = 7;
var y = 7;
var z = 8;
document.getElementById("demo").innerHTML =
(x == y) + "<br>" + (x == z);
</script>
</body>
</html>