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

NAME
       frexp, frexpf, frexpl - extract mantissa and exponent from a double precision number

SYNOPSIS
       #include <math.h>

       double frexp(double num, int *exp);
       float frexpf(float num, int *exp);
       long double frexpl(long double num, int *exp);

DESCRIPTION
       These  functions shall break a floating-point number num into a normalized fraction and an
       integral power of 2. The integer exponent shall be stored in the int object pointed to  by
       exp.

RETURN VALUE
       For  finite  arguments, these functions shall return the value x, such that x has a magni-
       tude in the interval [0.5,1) or 0, and num equals x times 2 raised to the power *exp.

       If num is NaN, a NaN shall be returned, and the value of *exp is unspecified.

       If num is +-0, +-0 shall be returned, and the value of *exp shall be 0.

       If num is +-Inf, num shall be returned, and the value of *exp is unspecified.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       isnan() , ldexp() , modf() , 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					 FREXP(P)
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