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| <title>The GNU Fortran Compiler: MODULO</title> |
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| <a name="MODULO-_002d_002d_002d-Modulo-function"></a> |
| <h3 class="section">8.178 <code>MODULO</code> — Modulo function</h3> |
| <a name="index-MODULO"></a> |
| <a name="index-modulo"></a> |
| <a name="index-division_002c-modulo"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p><code>MODULO(A,P)</code> computes the <var>A</var> modulo <var>P</var>. |
| </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 = MODULO(A, P)</code> |
| </p> |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>A</var></td><td width="70%">Shall be a scalar of type <code>INTEGER</code> or <code>REAL</code>.</td></tr> |
| <tr><td width="15%"><var>P</var></td><td width="70%">Shall be a scalar of the same type and kind as <var>A</var>. |
| It shall not be zero.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>The type and kind of the result are those of the arguments. |
| </p><dl compact="compact"> |
| <dt>If <var>A</var> and <var>P</var> are of type <code>INTEGER</code>:</dt> |
| <dd><p><code>MODULO(A,P)</code> has the value <var>R</var> such that <code>A=Q*P+R</code>, where |
| <var>Q</var> is an integer and <var>R</var> is between 0 (inclusive) and <var>P</var> |
| (exclusive). |
| </p></dd> |
| <dt>If <var>A</var> and <var>P</var> are of type <code>REAL</code>:</dt> |
| <dd><p><code>MODULO(A,P)</code> has the value of <code>A - FLOOR (A / P) * P</code>. |
| </p></dd> |
| </dl> |
| <p>The returned value has the same sign as P and a magnitude less than |
| the magnitude of P. |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">program test_modulo |
| print *, modulo(17,3) |
| print *, modulo(17.5,5.5) |
| |
| print *, modulo(-17,3) |
| print *, modulo(-17.5,5.5) |
| |
| print *, modulo(17,-3) |
| print *, modulo(17.5,-5.5) |
| end program |
| </pre></div> |
| |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p><a href="MOD.html#MOD">MOD</a> |
| </p> |
| </dd> |
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