To get the value of PI in JavaScript, use the Math.PI property. It returns the ratio of the circumference of a circle to its diameter, which is approximately 3.14159.
Example
You can try to run the following code to get the value of PI in JavaScript −
<html>
<head>
<title>JavaScript Math PI Property</title>
</head>
<body>
<script>
var property_value = Math.PI
document.write("Property Value: " + property_value);
</script>
</body>
</html>