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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.