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Enumerations & Optionals

Forgot to add instructions in last discussion. Wonder what is wrong with my code?

In the editor below you have two objects - classes named Point and Robot. The Robot stores its location as a point instance and contains a move function.

The task of this challenge is to complete the implementation for move. Move takes a parameter of type Direction which is an enumeration listing the possible movement directions.

When you tell the robot to move up (by specifying Direction.Up as the argument), the y coordinate should increase by 1. Similarly moving down means the y coordinate decreases by 1, moving right means the x coordinate increases by 1 and finally left means x decreases by 1.

/Users/mattconway/Desktop/Screen Shot 2016-03-01 at 5.04.57 PM.png

classes.swift
```class Point {
var x: Int
var y: Int

init(x: Int, y: Int){
self.x = x
self.y = y
}
}

enum Direction {
case Left
case Right
case Up
case Down
}

class Robot {
var location: Point

init() {
self.location = Point(x: 0, y: 0)
}

func move(direction: Direction) {
}
}
```

You need to write a control statement that moves the Robot depending on the parameter. Since Direction is an enum and therefore exhaustive a switch statement would work well!

```func move(direction: Direction) {
switch(direction) {
case Direction.Up: location.y += 1
break
case Direction.Down: location.y -= 1
break
case Direction.Left: location.x -= 1
break
case Direction.Right: location.x += 1

}
```

Definitely remove the breaks. Since this is an enum and exhaustive switch statement you don't need the breaks.

heres a hint, youll want to use a switch statement in the move funciton. switch on "direction". since its an enum it will have only the 4 cases. for each case youll have to adjust the position in a different way