<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\02213";
}
</style>
</head>
<body>
<p>Minus or Plus using Hexa Decimal: ∓</p>
<p>Minus or Plus using HTML Code: ∓</p>
<p>Minus or Plus using HTML Entity: ∓</p>
<p id="point">Minus or Plus using CSS Entity: </p> </body>
</html>