<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\0002E";
}
</style>
</head>
<body>
<p>Period using Hexa Decimal: .</p>
<p>Period using HTML Code: .</p>
<p>Period using HTML Entity: .</p>
<p id="point">Period using CSS Entity: </p>
</body>
</html>