Tag <sup> In HTML

Our goal is to illustrate Tag sup with examples in this post, in the hope that it will help you learn.

The <sup> tag is an HTML element that is used to represent superscript text. Superscript text is text that is positioned above the normal line of text, and is typically used for mathematical and scientific expressions, footnotes, and abbreviations.

Tag sup <sup> is used to define superscript text. Text written in superscript appears half a character above the normal line and may appear in a smaller font size. A footnote can be made with superscript text, for example http[1].

Advice: Add the <sub> tag to indicate the subscript text.

Here is an example of how to use the <sup> tag:

Example: 

<!DOCTYPE html> <html> <body> <p>This is a sentence with a <sup>superscript</sup> text in it.</p> </body> </html>

Here is an example of the <sup> tag:

Example: 

<!DOCTYPE html> <html> <body> <p>According to a recent study, the human brain is capable of storing a vast amount of information<sup>1</sup>.</p> <p> References:</p> <ol> <li><sup>1</sup>Smith, J. (2021). The capacity of the human brain. Journal of Neuroscience, 34(6), 1234-1240.</li> </ol> </body> </html>

The <sup> tag can be used to indicate a footnote number, and the footnote itself can be added to the bottom of the page:

Example: 

<!DOCTYPE html> <html> <body> <p>The earth is round<sup id="fnref:1">1</sup>.</p> <div class="footnotes"> <hr> <ol> <li id="fn:1">This statement is supported by overwhelming scientific evidence. <a href="#fnref:1">↩</a></li> </ol> </div> </body> </html>

The <sup> tag can also be reach the higher quality effect with CSS:

Example: 

<!DOCTYPE html> <html> <head> <style> #fnref { font-size: 0.8em; vertical-align: super; color: blue; } .footnote { background-color: #e0e0e0; } </style> </head> <body> <p>The earth is round<sup id="fnref">1</sup>.</p> <div class="footnotes"> <hr> <ol> <li id="fn:1">This statement is supported by overwhelming scientific evidence. <a href="#fnref">↩</a></li> </ol> </div> </body> </html>


Tag Sup Uses

Here are some common uses of the <sup> tag:

  • The <sup> tag is often used to display mathematical and scientific expressions, such as exponents, square roots, and chemical formulas. For example, the expression “2^3” would be written as “2<sup>3</sup>” in HTML.
  • The <sup> tag can also be used to represent footnotes in text. For example, if you want to add a footnote to a sentence, you can use the <sup> tag to position the footnote number above the text, and then add the corresponding footnote at the bottom of the page.
  • The <sup> tag can also be used to represent abbreviations in text. For example, if you want to display the abbreviation “P.S.” in superscript, you can use the <sup> tag to position the letters above the text.

Browser Compatibility

Element
<sup>YesYesYesYesYes

Attributes

Global

The <sup> tag in HTML is compatible with Global Attributes.

Event

The <sup> tag in HTML is compatible with Event Attributes as well.


Predefined CSS

The majority of browsers display the <sup> element using the following default values for Tag sup:

sup {
vertical-align: super;
font-size: smaller;
}

HTML Tag Sup Benefits

Some of the key benefits of using the <sup> tag include:

  • Superscript text can help improve the readability of your content by making it easier to distinguish between different types of information. For example, in mathematical or scientific expressions, superscript text can help indicate exponents, subscripts, and other types of notation.
  • The use of <sup> tags allows for consistent formatting of superscript text throughout your website. This can help improve the overall aesthetic of your site and make it easier for users to navigate and understand.
  • The use of <sup> tags can help improve the accessibility of your content by providing additional context for users who may have difficulty reading or understanding certain types of information. For example, the use of superscript text can help distinguish between footnotes and the main body of text.
  • Proper use of <sup> tags can help improve the search engine optimization (SEO) of your website. By using the tag to represent important information such as keywords or abbreviations, you can make it easier for search engines to index and rank your content.
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