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

no idea how to return the points

in this one ain't any idea how to increase the x and y

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) -> Point {
        // Enter your code below

        switch direction {

      case .left: return x -= 1
     case .right: return x += 1
      case .up: return y += 1
      case .down: return y -= 1



2 Answers

thks Bud appreciate!

You are not actually trying to return the points but change them.

func move(_ direction: Direction) {
        // Enter your code below
        switch direction {
          case .left: location.x -= 1
          case .right: location.x += 1
          case .up: location.y += 1
          case .down: location.y -= 1