# What is Addition Assignment Operator (+=) in JavaScript?

JavascriptWeb DevelopmentFront End Technology

It adds the right operand to the left operand and assigns the result to the left operand.

## Example

You can try to run the following code to learn how to work with Addition Assignment Operator −

<html>
<body>
<script>
var a = 33;
var b = 10;

document.write("Value of a => (a += b) => ");
result = (a += b);
document.write(result);
document.write(linebreak);
</script>
</body>
</html>
Published on 19-Jan-2018 05:40:20