Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Swift 2.0 Enumerations and Optionals Introduction to Enumerations Enums and Objects

shane reichefeld
shane reichefeld
Courses Plus Student 2,232 Points

What am i doing wrong with the enum

can anyone explain

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) {
        // Enter your code below
        switch directection -> Point {
            case Direction.Left: return x - 1
            case Direction.Right: return x + 1
            case Direction.Up: return y + 1
            case Direction.Down: return y - 1

1 Answer

Alexander Karan
Alexander Karan
Courses Plus Student 15,220 Points

Ok first you spelt direction wrong in the switch statement. You don't need to put a return section into your switch statement, if it needed one which it doesn't that would go in the func. Also use -= or +=

switch direction {
            case .Left: location.x -= 1
            case .Right: location.x += 1
            case .Up: location.y += 1
            case .Down: location.y -= 1