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### Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today. # Where are we using distance?

We have this method in the Moveable protocol
func move(_ direction: Direction, by distance: Int)

But we didn't use the distance argument for anything in the method, what's the point of this? Hello! In the move function and in the direction switch we case

```position = Point(x: position.x, y: position.y + 1)
```

so first the direction which is x or y and then distance and that is in this case position.x and position.y + 1, so the x position stays the same and the y position + 1! Hope this helps! 🙂

It looks like the instructor meant to implement the function like this:

```func move(_ direction: Direction, by distance: Int) {
switch direction {
case.up: position = Point(x: position.x, y: position.y + distance)
case.down: position = Point(x: position.x, y: position.y - distance)
case.right: position = Point(x: position.x + distance, y: position.y)
case.left: position = Point(x: position.x - distance, y: position.y)
}
}
```

My guess is that he just forgot to make use of that distance argument in the midst of writing out the implementation, instead using a fixed distance (of 1) for each direction.