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Linux 2.6 - man page for cbrtl (linux section 3posix)

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

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 negative results for nega-
       tive 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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					  CBRT(P)


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