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Linux 2.6 - man page for cbrt (linux section 3)

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

CONFORMING TO
       C99, POSIX.1-2001.

SEE ALSO
       pow(3), sqrt(3)

COLOPHON
       This  page  is  part of release 3.55 of the Linux man-pages project.  A description of the
       project,    and	  information	 about	  reporting    bugs,	can    be    found     at
       http://www.kernel.org/doc/man-pages/.

GNU					    2013-09-18					  CBRT(3)


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