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

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