csqrt, csqrtf, csqrtl - complex square root
Math library (
libm,
-lm)
#include <complex.h>
double complex csqrt(double complex z);
float complex csqrtf(float complex z);
long double complex csqrtl(long double complex z);
These functions calculate the complex square root of
z, with a branch cut
along the negative real axis. (That means that
csqrt(-1+eps*I) will be
close to I while
csqrt(-1-eps*I) will be close to -I,
if eps is
a small positive real number.)
These functions were added in glibc 2.1.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| csqrt (), csqrtf (), csqrtl () |
Thread safety |
MT-Safe |
C99, POSIX.1-2001, POSIX.1-2008.
cabs(3),
cexp(3),
complex(7)