{{alias}}( x )
    Returns an integer corresponding to the unbiased exponent of a double-
    precision floating-point number.

    Parameters
    ----------
    x: number
        Double-precision floating-point number.

    Returns
    -------
    out: integer
        Unbiased exponent.

    Examples
    --------
    > var exponent = {{alias}}( 3.14e-307 )
    -1019
    > exponent = {{alias}}( -3.14 )
    1
    > exponent = {{alias}}( 0.0 )
    -1023
    > exponent = {{alias}}( NaN )
    1024

    See Also
    --------