csqrt (3)

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);
Link with -lm.

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
 

CONFORMING TO

C99, POSIX.1-2001, POSIX.1-2008.

SEE ALSO

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

Information

Source
Linux kernel
OS/version
Source updated
September 15, 2017
Page created
February 9, 2018
Page generated
December 2, 2018