# What is decrement (--) operator in JavaScript?

The decrement operator decreases an integer value by one. Here’s an example where the value of a is decremented twice using decrement operator twice −

## Example

Live Demo

<html>
<body>
<script>
<!--
var a = 33;
a = --a;
document.write("--a = ");
result = --a;
document.write(result);
</script>
</body>
</html>