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 Optionals What is an Optional?

Raymond Espinoza
Raymond Espinoza
1,989 Points


func search(#name: String) -> String? {
    let names = ["Doc","Grumpy","Happy","Sleepy","Bashful","Sneezy","Dopey"]
    for n in names {
        if n == name {
            return n
    return nil
if let result = search("Doc") {
print("Found: \(result)")

Cant seem to figure This one out i have no clue what i am missing out on this code ?

1 Answer

Chris Shaw
Chris Shaw
26,650 Points

Hi Raymond,

Firstly, I have fixed your code formatting so please have a read of Posting Code to the Forum.

You have a few issues which are not what the challenge is looking for, they are:

  1. The search function has a named parameter called name, when calling functions with a named parameter you also need to include the label in the declaration

  2. You're not using the println function as requested

  3. All you need to print out is the word Found, the value of result isn't needed

if let result = search(name: "Doc") {

Happy coding!