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| <a name="NEAREST-_002d_002d_002d-Nearest-representable-number"></a> |
| <h3 class="section">9.195 <code>NEAREST</code> — Nearest representable number</h3> |
| <a name="index-NEAREST"></a> |
| <a name="index-real-number_002c-nearest-different"></a> |
| <a name="index-floating-point_002c-nearest-different"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p><code>NEAREST(X, S)</code> returns the processor-representable number nearest |
| to <code>X</code> in the direction indicated by the sign of <code>S</code>. |
| </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 = NEAREST(X, S)</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> |
| <tr><td width="15%"><var>S</var></td><td width="70%">Shall be of type <code>REAL</code> and |
| not equal to zero.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>The return value is of the same type as <code>X</code>. If <code>S</code> is |
| positive, <code>NEAREST</code> returns the processor-representable number |
| greater than <code>X</code> and nearest to it. If <code>S</code> is negative, |
| <code>NEAREST</code> returns the processor-representable number smaller than |
| <code>X</code> and nearest to it. |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">program test_nearest |
| real :: x, y |
| x = nearest(42.0, 1.0) |
| y = nearest(42.0, -1.0) |
| write (*,"(3(G20.15))") x, y, x - y |
| end program test_nearest |
| </pre></div> |
| </dd> |
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