What are closures in Swift?

What are closures in Swift?

Closures in Swift are self-contained blocks of functionality that can be passed around and used in your code.

Can you give me an example of a closure?

Sure! Here's a simple closure that adds two numbers:

let add = { (a: Int, b: Int) -> Int in
    return a + b
}
print(add(3, 5)) // Output: 8

How do closures capture values?

Closures capture and store references to any constants and variables from the surrounding context in which they are defined.

Are there different types of closures?

Yes, there are three types of closures in Swift: global functions, nested functions, and closure expressions.