<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\0221E";
}
</style>
</head>
<body>
<p>Infinity using Hexa Decimal: ∞</p>
<p>Infinity using HTML Code: ∞</p>
<p>Infinity using HTML Entity: ∞</p>
<p id="point">Infinity using CSS Entity: </p>
</body>
</html>