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<title>The GNU Fortran Compiler: IPARITY</title>

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Next: <a href="IRAND.html#IRAND" accesskey="n" rel="next">IRAND</a>, Previous: <a href="IOR.html#IOR" accesskey="p" rel="prev">IOR</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="IPARITY-_002d_002d_002d-Bitwise-XOR-of-array-elements"></a>
<h3 class="section">9.152 <code>IPARITY</code> &mdash; Bitwise XOR of array elements</h3>
<a name="index-IPARITY"></a>
<a name="index-array_002c-parity"></a>
<a name="index-array_002c-XOR"></a>
<a name="index-bits_002c-XOR-of-array-elements"></a>

<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p>Reduces with bitwise XOR (exclusive or) the elements of <var>ARRAY</var> along
dimension <var>DIM</var> if the corresponding element in <var>MASK</var> is <code>TRUE</code>.
</p>
</dd>
<dt><em>Standard</em>:</dt>
<dd><p>Fortran 2008 and later
</p>
</dd>
<dt><em>Class</em>:</dt>
<dd><p>Transformational function
</p>
</dd>
<dt><em>Syntax</em>:</dt>
<dd><table>
<tr><td width="80%"><code>RESULT = IPARITY(ARRAY[, MASK])</code></td></tr>
<tr><td width="80%"><code>RESULT = IPARITY(ARRAY, DIM[, MASK])</code></td></tr>
</table>

</dd>
<dt><em>Arguments</em>:</dt>
<dd><table>
<tr><td width="15%"><var>ARRAY</var></td><td width="70%">Shall be an array of type <code>INTEGER</code></td></tr>
<tr><td width="15%"><var>DIM</var></td><td width="70%">(Optional) shall be a scalar of type 
<code>INTEGER</code> with a value in the range from 1 to n, where n 
equals the rank of <var>ARRAY</var>.</td></tr>
<tr><td width="15%"><var>MASK</var></td><td width="70%">(Optional) shall be of type <code>LOGICAL</code> 
and either be a scalar or an array of the same shape as <var>ARRAY</var>.</td></tr>
</table>

</dd>
<dt><em>Return value</em>:</dt>
<dd><p>The result is of the same type as <var>ARRAY</var>.
</p>
<p>If <var>DIM</var> is absent, a scalar with the bitwise XOR of all elements in
<var>ARRAY</var> is returned. Otherwise, an array of rank n-1, where n equals
the rank of <var>ARRAY</var>, and a shape similar to that of <var>ARRAY</var> with
dimension <var>DIM</var> dropped is returned.
</p>
</dd>
<dt><em>Example</em>:</dt>
<dd><div class="smallexample">
<pre class="smallexample">PROGRAM test_iparity
  INTEGER(1) :: a(2)

  a(1) = b'00100100'
  a(2) = b'01101010'

  ! prints 01001110
  PRINT '(b8.8)', IPARITY(a)
END PROGRAM
</pre></div>

</dd>
<dt><em>See also</em>:</dt>
<dd><p><a href="IANY.html#IANY">IANY</a>, <a href="IALL.html#IALL">IALL</a>, <a href="IEOR.html#IEOR">IEOR</a>, <a href="PARITY.html#PARITY">PARITY</a>
</p></dd>
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