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iOS Object-Oriented Swift Classes and Objects Classes and Their Methods

classes and their methods challenge # 2

I don't understand what I'm missing.. throwing error "You forgot to add points to width property"

class Button {
  var width: Double = 0.0
  var height: Double = 0.0

  init(width: Double, height: Double) {
    self.width = width
    self.height = height
  func incrementBy(points: Double) {
    var size = (width + height + points)
1,811 Points

I believe you want

width += points
height += points

as your syntax

Thank you!