frexp(3)                                                       frexp(3)

  frexp()

  NAME

    frexp() - convert floating-point number to fractional and integral
    components

  SYNOPSIS

    #include 

    double frexp (double value, int *exp)

  DESCRIPTION

    The frexp(3) function breaks a floating-point number into a normalized
    fraction and an integral power of 2. It stores the integer in the int
    object pointed to by exp.

    Frexp(3) is the inverse of ldexp(3).

  RETURN VALUES

    The frexp(3) function returns the value x, such that x is a double with
    magnitude in the interval [1/2, 1) or zero, and value equals x times 2
    raised to the power *exp. If value is zero, both parts of the result are
    zero.

  SEE ALSO

    ldexp(3)

    modf(3)

  USAGE NOTES

    The frexp function is thread safe.

    The frexp function is not async-signal safe.