Tryit Editor v2.9

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<!DOCTYPE html>
<html>
<body>

<p>The NOT operator (!) returns true for false statements and false for true statements.</p>

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

<script>
var x = 6;
var y = 3;

document.getElementById("demo").innerHTML = 
!(x === y) + "<br>" + 
!(x > y);
</script>

</body>
</html>