NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON

CBRT(3)                   Linux Programmer's Manual                  CBRT(3)

NAME         top

       cbrt, cbrtf, cbrtl - cube root function

SYNOPSIS         top

       #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():
           _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 500 ||
           _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED || _ISOC99_SOURCE ||
           _POSIX_C_SOURCE >= 200112L;
           or cc -std=c99
       cbrtf(), cbrtl():
           _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 ||
           _ISOC99_SOURCE || _POSIX_C_SOUCE >= 200112L;
           or cc -std=c99

DESCRIPTION         top

       The cbrt() function returns the (real) cube root of x.  This function
       cannot fail; every representable real value has a representable real
       cube root.

RETURN VALUE         top

       These functions return the cube root of x.

       If x is +0, -0, positive infinity, negative infinity, or NaN, x is
       returned.

ERRORS         top

       No errors occur.

ATTRIBUTES         top

   Multithreading (see pthreads(7))
       The cbrt(), cbrtf(), and cbrtl() functions are thread-safe.

CONFORMING TO         top

       C99, POSIX.1-2001.

SEE ALSO         top

       pow(3), sqrt(3)

COLOPHON         top

       This page is part of release 3.72 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
       http://www.kernel.org/doc/man-pages/.

GNU                              2013-09-18                          CBRT(3)