Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Swift Enums and Structs Enums Enum Members and Raw Values

William Bergstein
William Bergstein
2,078 Points
Posted by William Bergstein
William Bergstein
2,078 Points

I don't understand this.

I tried to first create var turtleSpeed = Speed(rawValue: 10) but it said that the variable was expected to be an Int. So I tried to do an if let statement to unwind the optional, but I realized that wasn't going to make it an Int. I don't understand why it expects an Int and how do I get it to be an Int?

enum.swift 
enum Speed: Int {
    case Slow = 10
    case Medium = 50
    case Fast = 100
}

let turtleSpeed = Speed(rawValue: 10)!

1 Answer

Petar Popovic
PLUS
Petar Popovic
Courses Plus Student 23,421 Points
Petar Popovic
Petar Popovic
Courses Plus Student 23,421 Points

Hi William, yo need to assign Speed.Slow.rawValue to a constant turtleSeed, not Speed(rawValue: 10)!

This is correct code

enum Speed: Int {
    case Slow = 10
    case Medium = 50
    case Fast = 100
}

var turtleSpeed = Speed.Slow.rawValue