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| <h3 class="section">2.20 <code>csqrt</code>, <code>csqrtf</code>—complex square root</h3> |
| |
| <p><a name="index-csqrt-192"></a><a name="index-csqrtf-193"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <complex.h> |
| double complex csqrt(double complex <var>z</var>); |
| float complex csqrtf(float complex <var>z</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| These functions compute the complex square root of <var>z</var>, with |
| a branch cut along the negative real axis. |
| |
| <p><code>csqrtf</code> is identical to <code>csqrt</code>, except that it performs |
| its calculations on <code>floats complex</code>. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| The csqrt functions return the complex square root value, in |
| the range of the right halfplane (including the imaginary axis). |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| <code>csqrt</code> and <code>csqrtf</code> are ISO C99 |
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