csqrtl - complex square root

NAME  LIBRARY  SYNOPSIS  DESCRIPTION  ATTRIBUTES  STANDARDS  HISTORY  SEE ALSO 

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NAME

csqrt, csqrtf, csqrtl − complex square root

LIBRARY

Math library (libm, −lm)

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

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.)

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

STANDARDS

C11, POSIX.1-2008.

HISTORY

glibc 2.1. C99, POSIX.1-2001.

SEE ALSO

cabs(3), cexp(3), complex(7)

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