What is the proper syntax to add the point and width properties together within the incrementBy method? Doubles wont add

Question

I am getting an error message saying I forgot to add point property to width and height property within the incrementBy method. What is the proper syntax?
```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) -> Double {
  return points + width
  }
}
```

Jhoan Arango · Accepted Answer

Hello Ben: 
Challenge:
We need to provide a means to increase the size of our Button. So we are going to add a method named incrementBy which will accept a parameter named points. (Within the method add points to the width and height properties)
The challenge is asking you to create a method, this method only has one parameter and no return. On your code you have a return of type double. 
When doing challenges, I usually separate the task they give me, and do one by one. This way, it's easier for me to be able to pass the challenge. 
This is the function that you want to create in there.
```swift
func incrementBy(points: Double) {
width += points // adding points to width & height.
height += points
}
```
Good luck

Corey F · Answer

I think your code should work fine. I put it in a playground and it works.
alt text http://s8.postimg.org/m6ueagwmd/Screen_Shot_2015_11_17_at_9_21_27_PM.png

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Ben Turner

Ben Turner

What is the proper syntax to add the point and width properties together within the incrementBy method? Doubles wont add

2 Answers

Jhoan Arango

Jhoan Arango

Challenge:

Ben Turner

Ben Turner

Corey F

Corey F

Ben Turner

Ben Turner