Explain what the term 'Escaping' means in programming.

In programming, the term "Escaping" usually refers to the process of handling special characters or sequences so that they are not interpreted as part of the syntax, but rather taken literally. For example, in strings, characters like quotes, backslashes, or newlines need to be "escaped" so they do not break the string or cause an error.

In the context of iOS and Swift, the term "escaping closure" refers to a closure that can be called after the function it was passed to has finished executing. Such closures are marked with the @escaping keyword.

Example in Swift:

func performAsyncTask(completion: @escaping () -> Void) {
    DispatchQueue.global().async {
        // Asynchronous work
        completion() // call the closure after completion
    }
}

Here, completion is an escaping closure because it is called after the performAsyncTask function exits.