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CBRT(3)                    Linux Programmer's Manual                   CBRT(3)
NAME
       cbrt, cbrtf, cbrtl - cube root function
SYNOPSIS
       #include <math.h>
       double cbrt(double x);
       float cbrtf(float x);
       long double cbrtl(long double x);
       Link with -lm.
   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
       cbrt():
           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
               || _XOPEN_SOURCE >= 500
               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
               || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
       cbrtf(), cbrtl():
           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
               || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
DESCRIPTION
       These functions return the (real) cube root of x.  This function cannot
       fail; every representable real value  has  a  representable  real  cube
       root.
RETURN VALUE
       These functions return the cube root of x.
       If  x  is  +0,  -0,  positive infinity, negative infinity, or NaN, x is
       returned.
ERRORS
       No errors occur.
ATTRIBUTES
       For  an  explanation  of  the  terms  used   in   this   section,   see
       attributes(7).
       +-------------------------+---------------+---------+
       |Interface                | Attribute     | Value   |
       +-------------------------+---------------+---------+
       |cbrt(), cbrtf(), cbrtl() | Thread safety | MT-Safe |
       +-------------------------+---------------+---------+
CONFORMING TO
       C99, POSIX.1-2001, POSIX.1-2008.
SEE ALSO
       pow(3), sqrt(3)
COLOPHON
       This  page  is  part of release 4.15 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/.
GNU                               2017-09-15                           CBRT(3)