Enums with Power basics
Define enums with raw or associated values, use switch for exhaustive matching, and model states with them.
Enums with Power basics is a free Swift Academy lesson on CoddyKit. This is lesson 1 of 3. Any 3 lessons of this learning path are free to read in full — after that, CoddyKit PRO unlocks every lesson, plus hands-on practice with a built-in code editor and a 24/7 AI tutor. It is part of the Swift Academy learning path, and your progress syncs across the web and the CoddyKit app. The Swift Academy course includes 3 lessons in total.
Intro
Swift enums go beyond simple constants. They can have raw values or associated values and work with exhaustive switch statements.
Raw values
Raw values assign a constant value to each case, e.g., String or Int.
enum Direction: String {
case north = "N"
case south = "S"
}
print(Direction.north.rawValue)Associated values
Associated values let cases store extra data like usernames or IDs.
enum Login {
case user(String)
case guest
}
let l = Login.user("Ada")
print(l)Pattern matching
Use switch with pattern matching to extract associated values.
switch l {
case .user(let name): print("Hello", name)
case .guest: print("Guest access") }State modeling
Enums model finite states like connection status, with optional data.
enum Connection {
case connected
case disconnected
case connecting(Int) // progress percent
}
let c = Connection.connecting(50)
print(c)Tips
Tips:
- Enums are exhaustive: switch must cover all cases.
- Use associated values for flexible data.
- Raw values are simpler constants.
Enum data Q
Quick check: Which feature lets enum cases hold extra data?
Recap
Recap: Swift enums can have raw values or associated values. Use switch with pattern matching for exhaustive and powerful state modeling.
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Frequently Asked Questions
Is the “Enums with Power basics” lesson free?
Yes — any 3 lessons of the Swift Academy learning path, including “Enums with Power basics”, are free to read in full here on the web. After that, CoddyKit PRO unlocks every lesson, plus interactive practice with a built-in code editor and a 24/7 AI tutor. The Swift Academy course includes 3 lessons in total.
What will I learn in “Enums with Power basics”?
Define enums with raw or associated values, use switch for exhaustive matching, and model states with them. You practise Swift Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Swift Academy?
No prior experience is required. Swift Academy on CoddyKit is structured for beginners through advanced learners, so you can start here or from the beginning and move at your own pace. This is lesson 1 of 3.
How long does the “Enums with Power basics” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Swift Academy lesson?
Yes. Every Swift Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Enums with Power basics
- Powerful switch with pattern matching
- Finite state modeling