Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Swift Functions and Optionals Functions Function Return Types

Munir Niaz
Munir Niaz
1,831 Points

Modify the definition of the function named greeting to return a String and replace the println statement with a return

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".

1 Answer

Hi Munir,

You start with this:

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

That returns nothing and prints out a string. You want to return that string, rather than printing it out.

First, change the method signature to include a returned string:

func greeting(person: String) -> String { // returning a string
    println("Hello \(person)")
}

Then change the println to a return and lose the brackets:

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

I hope that helps.

Steve.