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iOS Swift Functions and Optionals Functions Function Return Types

println("Hello, \(greeting("Tom"))") not working. Any idea what's up?

func greeting(person: String) -> String { return person }

greeting("Tom")

is returning the correct thing but when I try and now print out the greeting with:

println("Hello (greeting("Tom"))")

I'm getting some error about needing a comma?

3 Answers

J.D. Sandifer
J.D. Sandifer
18,813 Points

In addition, William, if you were just testing out another method to print out the greeting, you would need to concatenate the string returned from the function with the "Hello " rather than trying to insert it with string interpolation. It would look like this:

println("Hello " + (greeting("Tom")))   // this would look like println("Hello " + "Tom")
                                        //  after the function returns the name
Holger Liesegang
Holger Liesegang
50,595 Points

Hi William,

Challenge Task 1 of 1

"Modify the definition of the function named greeting to return a String and replace the println statement with a return statement. The function should return a greeting. For example, if you pass in a string "Tom" then the return string would be: "Hello Tom"."

asks you to replace the println statement with a return statement: return ("Hello \(person)")

func greeting(person: String) -> String {
    return ("Hello \(person)")
}

...and welcome to Treehouse, William Flynn !

Thanks all!