Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Swift Functions and Optionals Optionals What is an Optional?

Using the if-let statement, assign the value from the search function to a constant named result. If the name was found,

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")  {
println("Found")
}

2 Answers

Hi Nader,

It looks like your problem is that you didn't include the name: in your search function.

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

could you please see this
func isDivisible(#dividend: Int, #divisor: Int) -> Bool { if dividend % divisor == 0 { return true } else { return false } }

func isNotDivisible(#dividend: Int, #divisor: Int) -> Bool? { if dividend % divisor == 1 { return true } return nil

}

Hi Nader,

For different Challenges, you'd want to create a new discussion so it's associated with the Challenge you're asking about.

However, at a glance, I'm not certain the question mark belongs after that Bool in isNotDivisible; I'd also expect isNotDivisible to return a False if not True instead of nil, unless that's what the challenge is asking for.