csqrt, csqrtf, csqrtl - complex square root
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)
close to I while csqrt(-1-eps*I)
will be close to -I, if eps
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
|csqrt (), csqrtf (), csqrtl ()
C99, POSIX.1-2001, POSIX.1-2008.