Tryit Editor v2.9

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<!DOCTYPE html>
<html>
<body>

<p>The charCodeAt() method returns the unicode of the character at a given position in a string:</p>

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

<script>
var str = "HELLO WORLD";
document.getElementById("demo").innerHTML = str.charCodeAt(0);
</script>
</body>
</html>