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<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Variables</h1>

<p>In this example, x, y, and z are variables</p>

<p id="demo"></p>

<script>
  var x = 5;
  var y = 6;
  var z = x + y;
  document.getElementById("demo").innerHTML = z;
</script>

</body>
</html>