<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\0005C";
}
</style>
</head>
<body>
<p>Backslash using Hexa Decimal: \</p>
<p>Backslash using HTML Code: \</p>
<p>Backslash using HTML Entity: \</p>
<p id="point">Backslash using CSS Entity: </p>
</body>
</html>