FREXP(3)

NAME
1.25 `frexp', `frexpf'--split floating-point number

SYNOPSIS
     #include <math.h>
     double frexp(double VAL, int *EXP);
     float frexpf(float VAL, int *EXP);

DESCRIPTION
All nonzero, normal numbers can be described as M * 2**P. `frexp' represents the double VAL as a mantissa M and a power of two P. The resulting mantissa will always be greater than or equal to `0.5', and less than `1.0' (as long as VAL is nonzero). The power of two will be stored in `*'EXP.
   M and P are calculated so that VAL is M times `2' to the power P.
   `frexpf' is identical, other than taking and returning floats rather than doubles.

RETURNS
`frexp' returns the mantissa M. If VAL is `0', infinity, or Nan, `frexp' will set `*'EXP to `0' and return VAL.

PORTABILITY
`frexp' is ANSI. `frexpf' is an extension.

SEE ALSO
frexp is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.