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FABS(3P)                   POSIX Programmer's Manual                  FABS(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
       fabs, fabsf, fabsl - absolute value function
SYNOPSIS
       #include <math.h>
       double fabs(double x);
       float fabsf(float x);
       long double fabsl(long double x);

DESCRIPTION
       These functions shall compute the absolute value of their argument  x,|
       x|.
RETURN VALUE
       Upon  successful  completion, these functions shall return the absolute
       value of x.
       If x is NaN, a NaN shall be returned.
       If x is +-0, +0 shall be returned.
       If x is +-Inf, +Inf shall be returned.
ERRORS
       No errors are defined.
       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       None.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       isnan(), 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                             FABS(3P)