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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():
 
_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 3.74 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/.
2013-09-18 GNU