Closures can also return values, and they are written similarly to parameters: you write them inside your closure, directly before the in
keyword.
To demonstrate this, we’re going to take our driving()
closure and make it return its value rather than print it directly. Here’s the original:
let driving = { (place: String) in
print("I'm going to \(place) in my car")
}
We want a closure that returns a string rather than printing the message directly, so we need to use -> String
before in
, then use return
just like a normal function:
let drivingWithReturn = { (place: String) -> String in
return "I'm going to \(place) in my car"
}
We can now run that closure and print its return value:
let message = drivingWithReturn("London")
print(message)
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