Manpages - cabs.3

cabs, cabsf, cabsl - absolute value of a complex number

  #include <complex.h>

  double cabs(double complex z);
  float cabsf(float complex z);
  long double cabsl(long double complex z);

  Link with -lm.

These functions return the absolute value of the complex number z. The result is a 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.

The function is actually an alias for hypot(a, b) (or, equivalently, sqrt(a*a + b*b)).

*abs*(3), *cimag*(3), *hypot*(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/.