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+<title>The GNU Fortran Compiler: ABS</title>
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+<a name="ABS"></a>
+<div class="header">
+<p>
+Next: <a href="ACCESS.html#ACCESS" accesskey="n" rel="next">ACCESS</a>, Previous: <a href="ABORT.html#ABORT" accesskey="p" rel="previous">ABORT</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>
+</div>
+<hr>
+<a name="ABS-_002d_002d_002d-Absolute-value"></a>
+<h3 class="section">8.3 <code>ABS</code> &mdash; Absolute value</h3>
+<a name="index-ABS"></a>
+<a name="index-CABS"></a>
+<a name="index-DABS"></a>
+<a name="index-IABS"></a>
+<a name="index-ZABS"></a>
+<a name="index-CDABS"></a>
+<a name="index-BABS"></a>
+<a name="index-IIABS"></a>
+<a name="index-JIABS"></a>
+<a name="index-KIABS"></a>
+<a name="index-absolute-value"></a>
+
+<dl compact="compact">
+<dt><em>Description</em>:</dt>
+<dd><p><code>ABS(A)</code> computes the absolute value of <code>A</code>.
+</p>
+</dd>
+<dt><em>Standard</em>:</dt>
+<dd><p>Fortran 77 and later, has overloads that are GNU extensions
+</p>
+</dd>
+<dt><em>Class</em>:</dt>
+<dd><p>Elemental function
+</p>
+</dd>
+<dt><em>Syntax</em>:</dt>
+<dd><p><code>RESULT = ABS(A)</code>
+</p>
+</dd>
+<dt><em>Arguments</em>:</dt>
+<dd><table>
+<tr><td width="15%"><var>A</var></td><td width="70%">The type of the argument shall be an <code>INTEGER</code>,
+<code>REAL</code>, or <code>COMPLEX</code>.</td></tr>
+</table>
+
+</dd>
+<dt><em>Return value</em>:</dt>
+<dd><p>The return value is of the same type and
+kind as the argument except the return value is <code>REAL</code> for a
+<code>COMPLEX</code> argument.
+</p>
+</dd>
+<dt><em>Example</em>:</dt>
+<dd><div class="smallexample">
+<pre class="smallexample">program test_abs
+  integer :: i = -1
+  real :: x = -1.e0
+  complex :: z = (-1.e0,0.e0)
+  i = abs(i)
+  x = abs(x)
+  x = abs(z)
+end program test_abs
+</pre></div>
+
+</dd>
+<dt><em>Specific names</em>:</dt>
+<dd><table>
+<thead><tr><th width="20%">Name</th><th width="23%">Argument</th><th width="20%">Return type</th><th width="33%">Standard</th></tr></thead>
+<tr><td width="20%"><code>ABS(A)</code></td><td width="23%"><code>REAL(4) A</code></td><td width="20%"><code>REAL(4)</code></td><td width="33%">Fortran 77 and later</td></tr>
+<tr><td width="20%"><code>CABS(A)</code></td><td width="23%"><code>COMPLEX(4) A</code></td><td width="20%"><code>REAL(4)</code></td><td width="33%">Fortran 77 and later</td></tr>
+<tr><td width="20%"><code>DABS(A)</code></td><td width="23%"><code>REAL(8) A</code></td><td width="20%"><code>REAL(8)</code></td><td width="33%">Fortran 77 and later</td></tr>
+<tr><td width="20%"><code>IABS(A)</code></td><td width="23%"><code>INTEGER(4) A</code></td><td width="20%"><code>INTEGER(4)</code></td><td width="33%">Fortran 77 and later</td></tr>
+<tr><td width="20%"><code>BABS(A)</code></td><td width="23%"><code>INTEGER(1) A</code></td><td width="20%"><code>INTEGER(1)</code></td><td width="33%">GNU extension</td></tr>
+<tr><td width="20%"><code>IIABS(A)</code></td><td width="23%"><code>INTEGER(2) A</code></td><td width="20%"><code>INTEGER(2)</code></td><td width="33%">GNU extension</td></tr>
+<tr><td width="20%"><code>JIABS(A)</code></td><td width="23%"><code>INTEGER(4) A</code></td><td width="20%"><code>INTEGER(4)</code></td><td width="33%">GNU extension</td></tr>
+<tr><td width="20%"><code>KIABS(A)</code></td><td width="23%"><code>INTEGER(8) A</code></td><td width="20%"><code>INTEGER(8)</code></td><td width="33%">GNU extension</td></tr>
+<tr><td width="20%"><code>ZABS(A)</code></td><td width="23%"><code>COMPLEX(8) A</code></td><td width="20%"><code>REAL(8)</code></td><td width="33%">GNU extension</td></tr>
+<tr><td width="20%"><code>CDABS(A)</code></td><td width="23%"><code>COMPLEX(8) A</code></td><td width="20%"><code>REAL(8)</code></td><td width="33%">GNU extension</td></tr>
+</table>
+</dd>
+</dl>
+
+
+
+
+
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