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| <h3 class="section">8.49 <code>CMPLX</code> — Complex conversion function</h3> |
| |
| <p><a name="index-CMPLX-521"></a><a name="index-complex-numbers_002c-conversion-to-522"></a><a name="index-conversion_002c-to-complex-523"></a> |
| <dl> |
| <dt><em>Description</em>:<dd><code>CMPLX(X [, Y [, KIND]])</code> returns a complex number where <var>X</var> is converted to |
| the real component. If <var>Y</var> is present it is converted to the imaginary |
| component. If <var>Y</var> is not present then the imaginary component is set to |
| 0.0. If <var>X</var> is complex then <var>Y</var> must not be present. |
| |
| <br><dt><em>Standard</em>:<dd>Fortran 77 and later |
| |
| <br><dt><em>Class</em>:<dd>Elemental function |
| |
| <br><dt><em>Syntax</em>:<dd><code>RESULT = CMPLX(X [, Y [, KIND]])</code> |
| |
| <br><dt><em>Arguments</em>:<dd> |
| <p><table summary=""><tr align="left"><td valign="top" width="15%"><var>X</var> </td><td valign="top" width="70%">The type may be <code>INTEGER</code>, <code>REAL</code>, |
| or <code>COMPLEX</code>. |
| <br></td></tr><tr align="left"><td valign="top" width="15%"><var>Y</var> </td><td valign="top" width="70%">(Optional; only allowed if <var>X</var> is not |
| <code>COMPLEX</code>.) May be <code>INTEGER</code> or <code>REAL</code>. |
| <br></td></tr><tr align="left"><td valign="top" width="15%"><var>KIND</var> </td><td valign="top" width="70%">(Optional) An <code>INTEGER</code> initialization |
| expression indicating the kind parameter of the result. |
| <br></td></tr></table> |
| |
| <br><dt><em>Return value</em>:<dd>The return value is of <code>COMPLEX</code> type, with a kind equal to |
| <var>KIND</var> if it is specified. If <var>KIND</var> is not specified, the |
| result is of the default <code>COMPLEX</code> kind, regardless of the kinds of |
| <var>X</var> and <var>Y</var>. |
| |
| <br><dt><em>Example</em>:<dd> |
| <pre class="smallexample"> program test_cmplx |
| integer :: i = 42 |
| real :: x = 3.14 |
| complex :: z |
| z = cmplx(i, x) |
| print *, z, cmplx(x) |
| end program test_cmplx |
| </pre> |
| <br><dt><em>See also</em>:<dd><a href="COMPLEX.html#COMPLEX">COMPLEX</a> |
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