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