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| <title>The GNU Fortran Compiler: SPACING</title> |
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| <a name="SPACING-_002d_002d_002d-Smallest-distance-between-two-numbers-of-a-given-type"></a> |
| <h3 class="section">9.244 <code>SPACING</code> — Smallest distance between two numbers of a given type</h3> |
| <a name="index-SPACING"></a> |
| <a name="index-real-number_002c-relative-spacing-1"></a> |
| <a name="index-floating-point_002c-relative-spacing-1"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p>Determines the distance between the argument <var>X</var> and the nearest |
| adjacent number of the same type. |
| </p> |
| </dd> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>Fortran 95 and later |
| </p> |
| </dd> |
| <dt><em>Class</em>:</dt> |
| <dd><p>Elemental function |
| </p> |
| </dd> |
| <dt><em>Syntax</em>:</dt> |
| <dd><p><code>RESULT = SPACING(X)</code> |
| </p> |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>X</var></td><td width="70%">Shall be of type <code>REAL</code>.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>The result is of the same type as the input argument <var>X</var>. |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">PROGRAM test_spacing |
| INTEGER, PARAMETER :: SGL = SELECTED_REAL_KIND(p=6, r=37) |
| INTEGER, PARAMETER :: DBL = SELECTED_REAL_KIND(p=13, r=200) |
| |
| WRITE(*,*) spacing(1.0_SGL) ! "1.1920929E-07" on i686 |
| WRITE(*,*) spacing(1.0_DBL) ! "2.220446049250313E-016" on i686 |
| END PROGRAM |
| </pre></div> |
| |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p><a href="RRSPACING.html#RRSPACING">RRSPACING</a> |
| </p></dd> |
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