How do I label function parameters and why is it useful?

In Swift, you can label function parameters to improve code readability and clarity. This allows both the developer and the user of the function to understand what each parameter represents without needing to dive into the function's implementation. It's beneficial for creating self-documenting code and enhancing the API usability.

Function parameter labels are defined by specifying a label before the parameter type. The first parameter can be given a label, but subsequent parameters usually need both an external and internal label. Here's an example:

func greet(name: String, age: Int) { print("Hello, \(name). You are \(age) years old.") } greet(name: "Alice", age: 30)

Swift function parameters parameter labels code readability self-documenting code

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