
{{alias}}( x, n )
    Computes the falling factorial of `x` and `n`.

    If not provided a nonnegative integer for `n`, the function returns `NaN`.

    If provided `NaN` as any argument, the function returns `NaN`.

    Parameters
    ----------
    x: number
        First function parameter.

    n: integer
        Second function parameter.

    Returns
    -------
    y: number
        Function value.

    Examples
    --------
    > var v = {{alias}}( 0.9, 5 )
    ~0.644
    > v = {{alias}}( -9.0, 3 )
    -990.0
    > v = {{alias}}( 0.0, 2 )
    0.0
    > v = {{alias}}( 3.0, -2 )
    NaN

    See Also
    --------

