Tryit Editor v2.9

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<!DOCTYPE html>
<html>
<body>

<p>JavaScript code (or just JavaScript) is a list of JavaScript statements.</p>

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

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

</body>
</html>