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In this page,we will learn about HTML <sub> tag.

Use of <sub> tag

The <sub> tag is used to define subscript texts.
Subscript texts are normally rendered with lowered baseline and smaller texts like 2 in H2O.

Display:Inline

Example of <sub> tag

H<sub> 2 </sub>O

Supported Browsers.

Tag
<sub> Yes Yes Yes Yes Yes

Full Code Example

<!DOCTYPE html>
<html>
<head>
</head>
<body>
<p>
The chemical formula of water is H<sub>2</sub>O.
</p>
</body>
</html>

Output

The chemical formula of water is H2O.

More Reference

The <sub> tag is mostly used in writing the chemical formula like H2O.
It also uses in writing variable scripts like x1,x2,........,xn,

Default CSS properties of <sub> tag

sub {
     font-size:smaller;
     vertical-align:sub;Or vertical-align:-25%;
}