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iOS Swift Collections and Control Flow Control Flow With Conditional Statements FizzBuzz Challenge

Posted by Oliver Alberry
Oliver Alberry
1,690 Points

FizzBuzz Challenge compiler error...works in Xcode.

The error returned is below:

swift_lint.swift:28:1: error: missing return in a function expected to return 'String' } ^

I've tried a little bit of everything to get this to work, but it won't. In Xcode it works fine, but I also had print statements instead of return. Going along with the Treehouse challenge instructions is where I'm running into trouble. It says to leave the return statement that they provide, but I need to include a default statement in order for the switch to work.

Is there something else I'm missing here? I see a lot of people using if/else statements, but I should be able to use a switch, right?

Thank you!! If I had hair, I'd be pulling it out right now!

fizzBuzz.swift 
func fizzBuzz(n: Int) -> String {
  // Enter your code between the two comment markers
for n in 1...100 {
switch true {
case n % 3 == 0 && n % 5 == 0: return "FizzBuzz"
case n % 3 == 0: return "Fizz"
case n % 5 == 0: return "Buzz"
default: return "\(n)"
}
}
}
Oliver Alberry
Oliver Alberry
1,690 Points

I just realized my indentation is a little odd, so I've since fixed it to read better, but it returns the same error.

1 Answer

kjvswift93
kjvswift93
13,515 Points

Instead of using a complicated switch statement, I just used an if - else statement. So if you were to call the fizzBuzz function and pass in a value of 12 for n, then it will print "Fizz".

func fizzBuzz(n: Int) -> String {
    // Enter your code between the two comment markers

    if (n % 3 == 0 && n % 5 != 0) {
        return("Fizz")
    } else if (n % 5 == 0 && n % 3 != 0) {
        return("Buzz")
    } else if (n % 3 == 0 && n % 5 == 0) {
        return("FizzBuzz")
    }
    // End code
    return "\(n)"
}

fizzBuzz(n: 12)

(!true || !false) && (true && !false)
Oliver Alberry
Oliver Alberry
1,690 Points

Thanks! I got it to work. Turns out I was confused by some of the direction- I was assigning a range of values, when treehouse was already taking care of that. Thanks for sharing your example and insight! For some reason I find switch/case statements easier to read than if/else statements, which is why I gave it a shot. I'm going to practice both a bit more.

kjvswift93
kjvswift93
13,515 Points

Good work! That's funny because always preferred if/else statements over switch statements, which I had more difficulty understanding when I first began. Keep up the good work.