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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  normal‐
       ized 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 magnitude 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 unspec‐
       ified.

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 original Standard can be  obtained	online
       at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group		     2003			      FREXP(P)
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