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

Gurpreet Bhachu
Gurpreet Bhachu
3,188 Points

Keep getting a compiler error but I think I am doing everything right

This is the function I've created. It ended up being similar to other solutions on the message board. I'm confused why I keep getting compiler errors...

Firstly, I've updated the enum to include Upper cased direction... I don't know where I am going wrong...

Maybe I need to use a self or a return statement but i've tried both these and it keeps telling me I have a compiler error...

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

2 Answers

You shouldn't update existing code unless specifically asked to do so. I changed the enum back to lowercase then added spaces between = and 1 in the switch statement and it passed.

        switch direction {
            case .left: location.x -= 1
            case .right: location.x += 1
            case .up: location.y += 1
            case .down: location.y -= 1
Gurpreet Bhachu
Gurpreet Bhachu
3,188 Points

I did not at first but tried a bunch of things when I could not get it to pass. I tried it again with the whitespace between the 1 and the ='s and it worked... thank you!