cbrtl(3p) - phpMan

CBRT(3P)                   POSIX Programmer's Manual                  CBRT(3P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
NAME
       cbrt, cbrtf, cbrtl - cube root functions
SYNOPSIS
       #include <math.h>
       double cbrt(double x);
       float cbrtf(float x);
       long double cbrtl(long double x);

DESCRIPTION
       These functions shall compute the real cube root of their argument x.
RETURN VALUE
       Upon successful completion, these functions shall return the cube  root
       of x.
       If x is NaN, a NaN shall be returned.
       If x is +-0 or +-Inf, x shall be returned.
ERRORS
       No errors are defined.
       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       None.
RATIONALE
       For  some  applications, a true cube root function, which returns nega-
       tive results for negative arguments, is more appropriate than  pow(  x,
       1.0/3.0), which returns a NaN for x less than 0.
FUTURE DIRECTIONS
       None.
SEE ALSO
       The Base Definitions volume of IEEE Std 1003.1-2001, <math.h>
COPYRIGHT
       Portions  of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE and
       The  Open Group Standard, the original IEEE and The Open Group Standard
       is the referee document. The original Standard can be  obtained  online
       at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                  2003                             CBRT(3P)