FABS(P)                                                                                   FABS(P)



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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .



POSIX                                          2003                                       FABS(P)