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iOS Swift Functions and Optionals Parameters and Tuples Tuples

Robert Bird
Robert Bird
26,122 Points
Posted by Robert Bird
Robert Bird
26,122 Points

I don't understand how the following code is wrong for challenge 2 o3 in Tuples videos. Please post correct code, thanks

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

return found

}

var result = greeting("Tom")

tuples.swift 
func greeting(person: String) -> (greeting: String, language: String)  {
    let language = "English"
    let greeting = "Hello \(person)"
    var found = (language, greeting)

    return found
}

var result = greeting("Tom")

1 Answer

Jhoan Arango
Jhoan Arango
14,575 Points
Jhoan Arango
Jhoan Arango
14,575 Points

Hello Robert:

This was an answer I gave another student. He had the same confusion with this challenge, and he said this helped him understand a bit better. IF this answer does not fit with you, please let me know and I will tailor an answer for you.

challenge says:

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.

let’s break it down

First part says: Modify it to return both the greeting and the language as a tuple. 

/* 
   Here the function says it will return just ONE value of type String
   and we need for it to say that it will return TWO values of type String. 
*/
func greeting(person: String) -> String { 
    let language = "English"
    let greeting = "Hello \(person)”
/*
   We also need to modify our return statement to return the two values,
   meaning, a tuple.
*/
    return greeting 
}

Here are the modifications:

                               // We create a tuple
func greeting(person: String) -> (String, String) {
    let language = "English"
    let greeting = "Hello \(person)"

    return greeting
}

Then it says: Make sure to name each item in the tuple: greeting and language.

                                    // We give them names
func greeting(person: String) -> (greeting: String, language: String) {
    let language = "English"
    let greeting = "Hello \(person)"

  // And modify it so that it returns both values of the tuple. 
    return (greeting, language)
}

var result = greeting(“Tom”)

Hope that clears it out for you a bit.