Edit This Code:
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Operators</h1>

<p>The assignment operator += can concatenate strings.</p>

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

<script>
txt1 = "What a very ";
txt1 += "nice day";
document.getElementById("demo").innerHTML = txt1;
</script>

</body>
</html>


Result:
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