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

My switch statement using enumerations doesn't work

I believe I got the concept of enumerations down, but I'm not sure why my code isn't working in this situation. Any information on what I'm doing wrong is greatly appreciated

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 direction {
        case Direction.up: return location.y += 1
        case Direction.down: return location.y -= 1
        case Direction.left: return location.x -= 1
        case Direction.right: return location.x +=1

1 Answer

Magnus Hållberg
Magnus Hållberg
17,232 Points

Its just a tiny little thing i the last row of the switch, you need a space between "+=" and 1. Nothing else.