csqrtl(3) -- Linux man page

 

NAME

csqrt, csqrtf, csqrtl - complex square root  

SYNOPSIS

#include <complex.h>

double complex csqrt(double complex z);

float complex csqrtf(float complex z);

long double complex csqrtl(long double complex z);

 

DESCRIPTION

Calculate the square root of a given complex number, with nonnegative real part, and 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.)  

CONFORMING TO

C99  

SEE ALSO

cabs(3), cexp(3)