Manpages - csqrt.3

csqrt, csqrtf, csqrtl - complex square root

  #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.

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.)

These functions first appeared in glibc in version 2.1.

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

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

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

This page is part of release 5.13 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.