HTML 'sub' and 'sup' Tag/Element

Q

What Are HTML "sub" and "sup" Tags/Elements?

✍: FYIcenter.com

A

"sub" and "sup" elements are inline elements that you can use to specify text to be treated as subscript and superscript respectively. Here are basic rules about "sub" and "sup" elements:

"sub" and "sup" elements are inline elements.
"sub" and "sup" elements can not be used at block level.
Contents of "sub" elements will be displayed in smaller font size, and positioned lower than normal text.
Contents of "sup" elements will be displayed in smaller font size, and positioned higher than normal text.

Here is a good tutorial example of "sub" and sup" elements:

<?xml version="1.0" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
 <head>
  <title>SUB and SUP Elements</title>
 </head>
 <body>
  <p>The most popular algebra formula:<br/>
  <code>(a+b)<sup>2</sup> 
   = a<sup>2</sup> + 2ab + b<sup>2</sup></code></p>
  <p>The right sided derivative:<br/>
  <code>f'(x) 
   = <sub>lim(dx-&gt;0)</sub>((f(x+dx)-f(x))/dx)</code></p>
 </body>
</html>

If you save the above document as sub_and_sup.html, and view it with Internet Explorer, you will see that mathematical formulas are displayed nicely with "sub" and "sup" elements as shown below:

HTML sub and sup Elements - Subscripts and Superscripts

⇒ HTML 'del' and 'ins' Tags/Elements

⇐ HTML 'code' Tag/Element

⇑ HTML In-line Elements and Tags

⇑⇑ HTML Tutorials

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