How can I convert this constants from Double to String and stick them to the right order? Cant understand...(

Hello Artem

I'll just let you know firstly - it's perfectly normal and ok to be frustrated when you don't understand something like this. I felt the same way when I first did this!

When you finally understand though, it will click quickly and you'll get it :-)

/* Firstly In your above code, all the constants are of type Double.

Yet you are trying to initialise them with assigned values that are of type String. e.g "red".

What you should be doing, is initialising them to accept the passed in value of the user of type Double.

Please take a look at my correct code below

struct RGBColor {
    let red: Double
    let green: Double
    let blue: Double
    let alpha: Double

    let description: String


    init (red: Double, green: Double, blue: Double, alpha: Double) {

        self.red = red
        self.green = green
        self.blue = blue
        self.alpha = alpha
        self.description = "red: \(red), green: \(green), blue: \(blue), alpha: \(alpha)"
    }
}

So what I have done here, is initialised the struct to accept whatever value the user inputs for red, green, blue, alpha.

However I have assigned a String value to description, (just like you had done in your code, for all the constants!). That way, the user only inputs the values for red, green, blue, alpha.

Description, takes all the values the user inputs, and is combined into a string

I hope this makes sense. Please let me know if you have any questions

Regards

Simon