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<a name="Inserting-Subscripts-and-Superscripts"></a>
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<a name="g_t_0040sub-and-_0040sup_003a-Inserting-Subscripts-and-Superscripts"></a>
<h3 class="section">12.6 <code>@sub</code> and <code>@sup</code>: Inserting Subscripts and Superscripts</h3>

<a name="index-sub"></a>
<a name="index-sup"></a>
<a name="index-Subscripts-and-superscripts_002c-text"></a>

<p>You can insert subscripts and superscripts, in either text or math,
with the <code>@sub</code> and <code>@sup</code> commands.  (For other
mathematical expressions, see the next section.)  For example, here is
a purely textual subscript and superscript:
</p>
<div class="example">
<pre class="example">here@sub{below}@sup{above}
</pre></div>

<p>produces:
</p>
<div class="display">
<pre class="display">here<sub>below</sub><sup>above</sup>
</pre></div>

<a name="index-Math-italic-font"></a>
<p>Inside <code>@math</code>, <code>@sub</code> and <code>@sup</code> produce
mathematical subscripts and superscripts.  This uses a different font
in the TeX output (math italic instead of text italic); it makes no
difference in the other output formats.  Here&rsquo;s an example:
</p>
<div class="example">
<pre class="example">@math{e@sup{x}}
</pre></div>

<p>produces:
</p>
<div class="display">
<pre class="display"><em>e<sup>x</sup></em>
</pre></div>

<p>In Info and plain text, regardless of being used inside <code>@math</code>,
<code>@sub{<var>text</var>}</code> is output as &lsquo;<samp>_{<var>text</var>}</samp>&rsquo; and
<code>@sup{<var>text</var>}</code> as &lsquo;<samp>^{<var>text</var>}</samp>&rsquo;, including the
literal braces (to mark the beginning and end of the &ldquo;script&rdquo; text
to the reader).
</p>
<p>When the output format (and display program) permit (TeX math,
HTML), the superscript is set above the subscript when both commands
are given consecutively.
</p>




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