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iOS Swift Functions and Optionals Parameters and Tuples Tuples

Posted by Ramiro Aguirre
Ramiro Aguirre
Courses Plus Student 16,725 Points

Tuple Problem

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.

dont know what to do here

it gives you this

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

  return greeting

}

Iago Wandalsen Prates
Iago Wandalsen Prates
21,699 Points
Iago Wandalsen Prates
Iago Wandalsen Prates
21,699 Points

Have you seen the tuple video? What have you tried so far?

5 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

you need to change the return type of the function to return a tuple instead of a string.

to make a function with a return type of tuple you can put (parameterName: dataType, parameterName: dataType) after the ->.

you can have multiple values inside the tuple, but in this case you just need to add two. greeting, which is a string, and langauge, which is a string as well.

finally you need to return the actual tuple

//change the return type to a tuple
func greeting(person: String) -> (greeting: String, language: String) {
    let language = "English"
    let greeting = "Hello \(person)"

    //return the tuple
    return (greeting, language)
}
Ramiro Aguirre
Ramiro Aguirre
Courses Plus Student 16,725 Points

exactly what i was looking for thanks a lot Preston

Marie Nipper
Marie Nipper
22,638 Points
Marie Nipper
Marie Nipper
22,638 Points

You know, of course there are multiple ways of doing it. Stone's example should work just fine. I solved it a little differently. Also, note that I'm new to all this, so I'm going to try and break it down how I understand it. If I'm wrong, someone please let me know.

//this initial line is the function with a single parameter
func greeting(person: String)

//you then tell the function what to return, (denoted by the 'arrow' ->) -- you don't have this in your code you listed --
func greeting(person: String) ->

//we wrap tuple in the paren and add labels. (the labels are the parts before the colon) 
//so it's -> (label: returnType, label: returnType)
func greeting(person: String) -> (greeting: String, language: String) {

     let language = "English"
      //here's where mine is different. 
     //A tuple has to be wrapped in paren and separated by a comma to return them in the order they are listed above

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

     return greeting 

}
Ramiro Aguirre
PLUS
Ramiro Aguirre
Courses Plus Student 16,725 Points
Ramiro Aguirre
Ramiro Aguirre
Courses Plus Student 16,725 Points

yep i have and clearly i havent get it so far .

i've tried

func greeting(person: String, language: String)

Li Lin
Li Lin
5,007 Points
Li Lin
Li Lin
5,007 Points

Ramiro, you don't need to modify the

 func greeting(person:String, language:String)

The question is asking you to modify what it returns, so your code needs to be modified after the -> symbol.

should look like

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

hope this helps

James Rawls
James Rawls
2,451 Points
James Rawls
James Rawls
2,451 Points

Thanks for the insight...the error I made was in the return section of the code by trying to call the function within itself. This is what I called <pre><code>return greeting (greeting, language)</code></pre> Should have been <pre><code>return (greeting, language)</code></pre>