Seven Languages in Seven Weeks Part: Io Recursion Revisited

I got bored and decided to do a better recursive Fibonacci method in Io. My previous one worked, but it had extra stuff in it that didn't need to be there. Here's a new one which has less garbage, but I think is still more efficient than the traditional recursive Fibonacci example that is used.

fib_recursive_2 := method(count,previous,current,

    if(count == nil, iteration := 0)
    if(previous == nil, previous := 0)
    if(current == nil, current := 1)

    if(count != 1,
      fib_recursive_2(count - 1, current, previous + current)
    )

    current println
)