Where did I go wrong in writing a method in a class?

Question

I am doing the exact thing of what the question is making for. why does it still give me an error?
How am I interpreting the question wrong? 
Is it asking for a return type of width and height?
```Button.swift
class Button {
  var width: Double
  var height: Double
  init(width:Double, height:Double){
    self.width = width
    self.height = height
func incrementBy(points: Double) {
    width = width + points
    height = height + points

}
  }
}
```

jcorum · Accepted Answer

Here's your function:
```swift
    func incrementBy(points: Double) {
        width = width + points
        height = height + points
}
```
This one I just tested and it passes:
```swift
  func incrementBy(points: Double) {
    width += points
    height += points
  }
```
I'm really puzzled??  width += points is supposed to be shorthand for width = width + points
p

So then I try a little experiment.  I paste just your function in, and it passes.  I start over, and this time I paste in all your code, replacing everything that's there, and I get this error message.  
swift
swift_lint.swift:12:15: error: cannot assign to 'let' value 'width'
        width = width + points
        ~~~~~ ^
swift_lint.swift:13:16: error: cannot assign to 'let' value 'height'
        height = height + points

But I can't see any difference between your code and theirs, except for spacing!

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RAJ PATEL

RAJ PATEL

Where did I go wrong in writing a method in a class?

1 Answer

jcorum

jcorum