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iOS Swift 2.0 Basics Swift Types Mixed Types

Posted by Harrison Tseng
Harrison Tseng
802 Points

Finally, we need to indicate whether the book is available in our store. Declare a variable named isAvailable and assign

thanks

types.swift 
// Enter your code below
let title = "A Dance with Dragons"
var rating = 7.5
var boolean isAvailable = 0

1 Answer

Jason Anders
MOD
Jason Anders
Treehouse Moderator 145,860 Points
Jason Anders
Jason Anders
Treehouse Moderator 145,860 Points

Hey Harrison,

You've got a couple things going wrong here.

  • First, you've seemed to have injected a bit of Objective-C into the last line of code. In Swift, you don't need to declare type. So, you don't need to have "boolean" in the declaration.

  • Second, with some exceptions (beyond the scope of this question), boolean values can only be "true" or "false", and you are assigning 0.

If you fix those up, you're good to go. Good job. :)

var isAvailable = false

:dizzy:

Harrison Tseng
Harrison Tseng
802 Points

Thanks Jason, but why do I assign isAvailable to false instead of true

Jason Anders
Jason Anders
Treehouse Moderator 145,860 Points
Jason Anders
Jason Anders
Treehouse Moderator 145,860 Points

Hi Harrison,

You know, when I was checking the quiz/code for your post, I was just paying attention to what the challenge was asking for. But then a few days ago, someone also pointed this out. You can read it in this forum post. As Pasan replied, this was an error in the challenge, but as Greg points out, both are fine as the value is stored in a variable and therefore changeable.

Good catch though! :)