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iOS Swift Functions and Optionals Functions Function Return Types

Jack Ames
Jack Ames
501 Points
Posted by Jack Ames
Jack Ames
501 Points

This says I have it wrong but I was positive I got it right!

What should i do

returns.swift 
func greeting(person: String) {
    println("Hello \(person)")
}

greeting("Tom")

2 Answers

Martin Wildfeuer
PLUS
Martin Wildfeuer
Courses Plus Student 11,071 Points
Martin Wildfeuer
Martin Wildfeuer
Courses Plus Student 11,071 Points

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.

This assignment is all about returning values from functions. To be more specific: Tuples, that is more than a single value. The way you changed the code, greeting does not return anything anymore, but prints to the console.

So how does the return type tuple look like? Well, not unlike what we pass to the function if we have multiple values. If we wanted to return two strings, the function would look like this

 func aFunction(aString: String) -> (firstString: String, secondString: String) {
   . . .
}

So, how would the return statement inside the function body look like?

 func aFunction(aString: String) -> (firstString: String, secondString: String) {
   let stringOne = "I am the first String"
   let stringTwo = "and I am the second!"
   return (stringOne, stringTwo)
}

Although we are not using aString for this example, we are returning two string values as soon as the function is called.

Let's try and apply this to the assignment!