I can't figure out how to return the tuple elements. I don't think it was covered in the video before this question.

Task 1 states: Currently our greeting function only returns a single value. Modify it to return both the greeting and the language as a tuple. Make sure to name each item in the tuple: greeting and language. We will print them out in the next task.

so instead of returning a string, we need to return a tuple with 2 members inside it. they both need to be Strings and they need to be named greeting and language, in that order.

we can add the return type of tuple by placing (greeting: String, language: String) after the ->

func greeting(person: String) -> (greeting: String, language: String) {
    let language = "English"
    let greeting = "Hello \(person)"

    return greeting
}

however, we still need to change the return value at the end of the function to actually return this tuple. We can do this by placing (greeting, language) after the return keyword. this will return the language string and greeting string constants that get set inside the function as a tuple

func greeting(person: String) -> (greeting: String, language: String) {
    let language = "English"
    let greeting = "Hello \(person)"

    return (greeting, language)
}

note that you do not include the type of the members in the return statement, just the return value in the function header

see the Swift eBook for more information on tuples