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iOS Swift Functions and Optionals Parameters and Tuples Tuples

Posted by Adam Wessell
Adam Wessell
1,154 Points

I still don't understand

Create a variable named result and assign it the tuple returned from function greeting. (Note: pass the string "Tom" to the greeting function.)

tuples.swift 
func greeting(person: String) -> (language: String, greeting:String) {

  var result = (language, greeting)

    let language = "English"
    let greeting = "Hello \(person)"

    return (language, greeting)
}

greeting("Tom")

1 Answer

Ryan Hoffmann
Ryan Hoffmann
7,815 Points

Your function would look like this:

func greeting(person: String) -> (language: String, greeting:String) {

    let language = "English"
    let greeting = "Hello \(person)"

    return (language, greeting)
}

As you can see, the method grabs the persons name that you pass into the function, and then uses String interpolation to include the value stored in the "person" parameter into the greeting String. You then return a tuple containing the language and greeting.

The below "result" variable is then assigned the value that is returned from the "greeting" method (outside of the above function), which as mentioned above, is the tuple containing the language and greeting.

var result = greeting("Tom")

So the full thing could look like this:

func greeting(person: String) -> (language: String, greeting:String) {

    let language = "English"
    let greeting = "Hello \(person)"

    return (language, greeting)
}

var result = greeting("Tom")

println("Greeting: \(result.greeting)") //to test that the assignment worked!

Hope this helps!

Adam Wessell
Adam Wessell
1,154 Points

Thank you Ryan! Was a huge help!