To get base 2 logarithms of E, use the Math LOG2E property. It returns base 2 logarithm of E which is approximately 1.442.
Example
You can try to run the following code to get base 2 logarithms of E in JavaScript:
<html>
<head>
<title>JavaScript Math LOG2E Property</title>
</head>
<body>
<script>
var property_value = Math.LOG2E
document.write("Property Value is : " + property_value);
</script>
</body>
</html>