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<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Operators</h1>

<p>The + operator concatenates (adds) strings.</p>

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

<script>
var txt1 = "John";
var txt2 = "Doe";
document.getElementById("demo").innerHTML = txt1 + " " + txt2;
</script>

</body>
</html>