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Swift Academy · Lesson

Result<Success, Failure> Fundamentals

Creating and pattern-matching Result values for explicit error handling.

Welcome

`Result` is a Swift enum with two cases — `.success` and `.failure` — providing explicit error handling without throws/catch syntax.

Declaring Result

```swift func divide(_ a: Double, by b: Double) -> Result { guard b != 0 else { return .failure(.divisionByZero) } return .success(a / b) } enum DivisionError: Error { case divisionByZero } ```

All lessons in this course

  1. Result Fundamentals
  2. map and flatMap on Result
  3. Custom Error Types with LocalizedError
  4. Bridging Result to async/await
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