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.)

VERSIONS¶

These functions were added in glibc 2.1.

ATTRIBUTES¶

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

STANDARDS¶

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

SEE ALSO¶

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