135 lines
4.8 KiB
HTML
135 lines
4.8 KiB
HTML
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<title>The GNU Fortran Compiler: SPACING</title>
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="SPACING"></a>
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<div class="header">
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<p>
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Next: <a href="SPREAD.html#SPREAD" accesskey="n" rel="next">SPREAD</a>, Previous: <a href="SLEEP.html#SLEEP" accesskey="p" rel="prev">SLEEP</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="SPACING-_002d_002d_002d-Smallest-distance-between-two-numbers-of-a-given-type"></a>
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<h3 class="section">9.245 <code>SPACING</code> — Smallest distance between two numbers of a given type</h3>
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<a name="index-SPACING"></a>
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<a name="index-real-number_002c-relative-spacing-1"></a>
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<a name="index-floating-point_002c-relative-spacing-1"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p>Determines the distance between the argument <var>X</var> and the nearest
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adjacent number of the same type.
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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 95 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>Elemental 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><p><code>RESULT = SPACING(X)</code>
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</p>
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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>X</var></td><td width="70%">Shall be of type <code>REAL</code>.</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 the input argument <var>X</var>.
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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_spacing
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INTEGER, PARAMETER :: SGL = SELECTED_REAL_KIND(p=6, r=37)
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INTEGER, PARAMETER :: DBL = SELECTED_REAL_KIND(p=13, r=200)
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WRITE(*,*) spacing(1.0_SGL) ! "1.1920929E-07" on i686
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WRITE(*,*) spacing(1.0_DBL) ! "2.220446049250313E-016" on i686
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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="RRSPACING.html#RRSPACING">RRSPACING</a>
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</p></dd>
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</dl>
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