type for return value , when creating a struct method !!

Question

Hello every one :) i did this code :

    struct StudentsInAlBahaUNI {
var StudentName : String
var ID : Int
var Phnumber : Int
var level = 1



init (fandlName : String , PhoneN: Int , StudentNumber : Int ) {
    self.StudentName = fandlName
    self.ID = StudentNumber
    self.Phnumber = PhoneN
    self.level = 1
}
func AllInformation () -> (String) {
    return "\(self.StudentName) \(self.Phnumber) \(self.ID) \(self.level) "
}

}

and it gave me a true outcome but i'm confused because when i tried to specify a (String , Int) type to what will return it showed an errors !!

Answer 1 · 2015-10-29T23:05:36Z

October 29, 2015 11:05pm

In your code above all information is returned as a single string value using string interpolation, therefore, it does not generate any error.
In my solution each part is returned as a separate value and the reason why we need to mention Int 3 times is that we are returning 3 integer values. The second option has more usage because you are returning values separately, which can be referred to later in the app ,if required. For example: You can assign each value returned by function to seperat variables:

var name = frstStudent.AllInformation().0
var id = frstStudent.AllInformation().2

Or We can make it more descrpitve by changing the function declaration as following:

func AllInformation() -> (name: String, phone: Int, ID: Int, level: Int) {
        return (self.StudentName, self.Phnumber, self.ID, self.level)
    }

In the function above, we have named our parameters so we can refer to them by name. Example:

var name = frstStudent.AllInformation().name
var level = frstStudent.AllInformation().level

This way we can work with each value returned by function separately while it is not possible when returning them as a single string.

The concept I explained above is covered in Tuples lesson.

نو پروبلم :)

Answer 2 · 2015-10-29T01:53:40Z

October 29, 2015 1:53am

Hello, did you mean something like this? If yes, the reason why it was showing you error was because your function was returning a string.

struct StudentsInAlBahaUNI { var StudentName : String var ID : Int var Phnumber : Int var level = 1

init (fandlName : String , PhoneN: Int , StudentNumber : Int ) {
    self.StudentName = fandlName
    self.ID = StudentNumber
    self.Phnumber = PhoneN
    self.level = 1

}

func AllInformation() -> (String, Int, Int, Int) { return (self.StudentName, self.Phnumber, self.ID, self.level) } }

Hope it helps

Answer 3 · 2015-10-29T19:21:36Z

October 29, 2015 7:21pm

علیکم السلام٬انا لست عرب لكنني أحاول تعلم اللغة العربية. وأنا أعلم فصحی العربية قليلا. Ok what i understood from your message is that why do we need to put Int 3 times. It is because the function is returning 1 string and 3 integer values ( phone number, ID, level)

سلام

Welcome to the Treehouse Community

Looking to learn something new?

NOUR A ALGHAMDI

NOUR A ALGHAMDI

type for return value , when creating a struct method !!

3 Answers

Farhad Mohammad Afzali

Farhad Mohammad Afzali

Farhad Mohammad Afzali

Farhad Mohammad Afzali

NOUR A ALGHAMDI

NOUR A ALGHAMDI

NOUR A ALGHAMDI

NOUR A ALGHAMDI

NOUR A ALGHAMDI

NOUR A ALGHAMDI

Farhad Mohammad Afzali

Farhad Mohammad Afzali

Farhad Mohammad Afzali

Farhad Mohammad Afzali

NOUR A ALGHAMDI

NOUR A ALGHAMDI

NOUR A ALGHAMDI

NOUR A ALGHAMDI