Missing return in a function expected to return 'Double?'

Question

I\'m grinding through Apple\'s App Development with Swift book and I have been having a few issues with the Optionals sections.

I\'m getting stuck accessing a dictionary

Answer 1

Your function can be shortened a hell of a lot by taking advantage of some of the tools that’s Swift gives you. Here, take a look, this does the same thing...

func priceCheck(name: String) -> Double? {
    guard let stockAmount = stock[name],
        stockAmount > 0,
        let price = prices[name] else {
        return nil
    }

    return price
}