1CBRT(P)                    POSIX Programmer's Manual                   CBRT(P)
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NAME

6       cbrt, cbrtf, cbrtl - cube root functions
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SYNOPSIS

9       #include <math.h>
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11       double cbrt(double x);
12       float cbrtf(float x);
13       long double cbrtl(long double x);
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DESCRIPTION

17       These functions shall compute the real cube root of their argument x.
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RETURN VALUE

20       Upon  successful completion, these functions shall return the cube root
21       of x.
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23       If x is NaN, a NaN shall be returned.
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25       If x is ±0 or ±Inf, x shall be returned.
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ERRORS

28       No errors are defined.
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30       The following sections are informative.
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EXAMPLES

33       None.
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APPLICATION USAGE

36       None.
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RATIONALE

39       For some applications, a true cube root function, which  returns  nega‐
40       tive  results  for negative arguments, is more appropriate than pow( x,
41       1.0/3.0), which returns a NaN for x less than 0.
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FUTURE DIRECTIONS

44       None.
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SEE ALSO

47       The Base Definitions volume of IEEE Std 1003.1-2001, <math.h>
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50       Portions of this text are reprinted and reproduced in  electronic  form
51       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
52       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
53       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
54       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
55       event of any discrepancy between this version and the original IEEE and
56       The Open Group Standard, the original IEEE and The Open Group  Standard
57       is  the  referee document. The original Standard can be obtained online
58       at http://www.opengroup.org/unix/online.html .
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62IEEE/The Open Group                  2003                              CBRT(P)
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