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<h3 class="section">39.16 Prefixes</h3>
<p><a name="index-prefixes-2461"></a><a name="index-constants_002c-prefixes-2462"></a>
These constants are dimensionless scaling factors.
<dl>
<dt><code>GSL_CONST_NUM_YOTTA</code><dd><!-- {$10^{24}$} -->
10^24
<br><dt><code>GSL_CONST_NUM_ZETTA</code><dd><!-- {$10^{21}$} -->
10^21
<br><dt><code>GSL_CONST_NUM_EXA</code><dd><!-- {$10^{18}$} -->
10^18
<br><dt><code>GSL_CONST_NUM_PETA</code><dd><!-- {$10^{15}$} -->
10^15
<br><dt><code>GSL_CONST_NUM_TERA</code><dd><!-- {$10^{12}$} -->
10^12
<br><dt><code>GSL_CONST_NUM_GIGA</code><dd>10^9
<br><dt><code>GSL_CONST_NUM_MEGA</code><dd>10^6
<br><dt><code>GSL_CONST_NUM_KILO</code><dd>10^3
<br><dt><code>GSL_CONST_NUM_MILLI</code><dd><!-- {$10^{-3}$} -->
10^-3
<br><dt><code>GSL_CONST_NUM_MICRO</code><dd><!-- {$10^{-6}$} -->
10^-6
<br><dt><code>GSL_CONST_NUM_NANO</code><dd><!-- {$10^{-9}$} -->
10^-9
<br><dt><code>GSL_CONST_NUM_PICO</code><dd><!-- {$10^{-12}$} -->
10^-12
<br><dt><code>GSL_CONST_NUM_FEMTO</code><dd><!-- {$10^{-15}$} -->
10^-15
<br><dt><code>GSL_CONST_NUM_ATTO</code><dd><!-- {$10^{-18}$} -->
10^-18
<br><dt><code>GSL_CONST_NUM_ZEPTO</code><dd><!-- {$10^{-21}$} -->
10^-21
<br><dt><code>GSL_CONST_NUM_YOCTO</code><dd><!-- {$10^{-24}$} -->
10^-24
</dl>
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