151 lines
5.6 KiB
HTML
151 lines
5.6 KiB
HTML
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<head>
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<title>The GNU Fortran Compiler: IPARITY</title>
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="IPARITY"></a>
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<div class="header">
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<p>
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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> [<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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</div>
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<hr>
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<a name="IPARITY-_002d_002d_002d-Bitwise-XOR-of-array-elements"></a>
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<h3 class="section">9.145 <code>IPARITY</code> — Bitwise XOR of array elements</h3>
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<a name="index-IPARITY"></a>
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<a name="index-array_002c-parity"></a>
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<a name="index-array_002c-XOR"></a>
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<a name="index-bits_002c-XOR-of-array-elements"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p>Reduces with bitwise XOR (exclusive or) the elements of <var>ARRAY</var> along
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dimension <var>DIM</var> if the corresponding element in <var>MASK</var> is <code>TRUE</code>.
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</p>
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</dd>
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<dt><em>Standard</em>:</dt>
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<dd><p>Fortran 2008 and later
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</p>
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</dd>
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<dt><em>Class</em>:</dt>
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<dd><p>Transformational function
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><table>
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<tr><td width="80%"><code>RESULT = IPARITY(ARRAY[, MASK])</code></td></tr>
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<tr><td width="80%"><code>RESULT = IPARITY(ARRAY, DIM[, MASK])</code></td></tr>
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</table>
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</dd>
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<dt><em>Arguments</em>:</dt>
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<dd><table>
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<tr><td width="15%"><var>ARRAY</var></td><td width="70%">Shall be an array of type <code>INTEGER</code></td></tr>
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<tr><td width="15%"><var>DIM</var></td><td width="70%">(Optional) shall be a scalar of type
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<code>INTEGER</code> with a value in the range from 1 to n, where n
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equals the rank of <var>ARRAY</var>.</td></tr>
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<tr><td width="15%"><var>MASK</var></td><td width="70%">(Optional) shall be of type <code>LOGICAL</code>
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and either be a scalar or an array of the same shape as <var>ARRAY</var>.</td></tr>
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</table>
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</dd>
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<dt><em>Return value</em>:</dt>
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<dd><p>The result is of the same type as <var>ARRAY</var>.
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</p>
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<p>If <var>DIM</var> is absent, a scalar with the bitwise XOR of all elements in
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<var>ARRAY</var> is returned. Otherwise, an array of rank n-1, where n equals
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the rank of <var>ARRAY</var>, and a shape similar to that of <var>ARRAY</var> with
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dimension <var>DIM</var> dropped is returned.
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</p>
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</dd>
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<dt><em>Example</em>:</dt>
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<dd><div class="smallexample">
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<pre class="smallexample">PROGRAM test_iparity
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INTEGER(1) :: a(2)
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a(1) = b'00100100'
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a(2) = b'01101010'
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! prints 01001110
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PRINT '(b8.8)', IPARITY(a)
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END PROGRAM
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</pre></div>
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</dd>
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<dt><em>See also</em>:</dt>
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<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>
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</p></dd>
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</dl>
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