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).
Interface | Attribute | Value |
csqrt(), csqrtf(), csqrtl() | Thread safety | MT-Safe |
C99, POSIX.1-2001, POSIX.1-2008.
This page is part of release 5.10 of the Linux man-pages
project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.