csqrt, csqrtf, csqrtl - complex square root
#include <complex.h> double complex csqrt(double complex z); float complex csqrtf(float complex z); long double complex csqrtl(long double complex z); Link with -lm.
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 first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see attributes(7).
|csqrt(), csqrtf(), csqrtl()||Thread safety||MT-Safe|
C99, POSIX.1-2001, POSIX.1-2008.
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