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O² & O₂

special symbol

`O²` & `O₂`

HTML

HTML subscript and superscript Tags

HTML 下标元素

HTML 上标元素

`` & ``

H2O === H₂O

O2 === O²

<p>Almost every developer's favorite molecule is
C<sub>8</sub>H<sub>10</sub>N<sub>4</sub>O<sub>2</sub>, also known as "caffeine."</p>

Almost every developer's favorite molecule is C₈H₁₀N₄O₂, also known as "caffeine."


<p>The <b>Pythagorean theorem</b> is often expressed as the following equation:</p>

<p><var>a<sup>2</sup></var> + <var>b<sup>2</sup></var> = <var>c<sup>2</sup></var></p>

The Pythagorean theorem is often expressed as the following equation:

a² + b² = c²

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/sub

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/sup

var tag

<p>The volume of a box is <var>l</var> × <var>w</var> × <var>h</var>, where <var>l</var> represents the length, <var>w</var> the width and <var>h</var> the height of the box.</p>

The volume of a box is l × w × h, where l represents the length, w the width and h the height of the box.

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/var