csqrtl (3)
NAME
csqrt, csqrtf, csqrtl - complex square rootSYNOPSIS
#include <complex.h> double complex csqrt(double complex z);DESCRIPTION
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.)VERSIONS
These functions first appeared in glibc in version 2.1.ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).Interface | Attribute | Value |
csqrt (), csqrtf (), csqrtl () | Thread safety | MT-Safe |