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<a name="infinity_002c-infinityf_002d_002d_002drepresentation-of-infinity"></a>
<h3 class="section">1.30 <code>infinity</code>, <code>infinityf</code>&mdash;representation of infinity</h3>
<a name="index-infinity"></a>
<a name="index-infinityf"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;math.h&gt;
double infinity(void);
float infinityf(void);

</pre></div>
<p><strong>Description</strong><br>
<code>infinity</code> and <code>infinityf</code> return the special number IEEE
infinity in double- and single-precision arithmetic
respectively.
</p>
<br>
<p><strong>Portability</strong><br>
<code>infinity</code> and <code>infinityf</code> are neither standard C nor POSIX.  C and
POSIX require macros HUGE_VAL and HUGE_VALF to be defined in math.h, which
Newlib defines to be infinities corresponding to these archaic infinity()
and infinityf() functions in floating-point implementations which do have
infinities.
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