Does not allow me to have calculateArea(12, 10) I must have, width: before the 10. Why is it making me do this?

Linh,

You are correct. Using the # has recently been removed from Swift. The way I see this working now is to do the following:

func calculateArea( height height: Int, width : Int) {

     let result = height * width;
     print("The area is" \(result)");

}

calculateArea( height : 5, width : 10);

Notice that you do not have to use two width words. You can also take out the second height, but then when you call calculateArea you would only pass in the number for height while still being required to use width : number. I prefer the former as it is very clear what I am passing to my function.

Please let me know if this helps.

Regards,

Chris

So, according to Apple's documentation, when dealing with multiple parameters in a function, all parameters after the first parameter must be labeled. Therefore, here are three examples.

Function with 1 parameter:

var groceryList = ["Apples", "Milk", "Bread", "Eggs"]

func printList(list: String) {

        print(list)

    }

printList("\(groceryList)")

// Notice that I don't have to use printList(list: "\(groceryList)")

Function with 2 parameters (your example):

func calculateArea(height: Int, width: Int) {

    let area = height * width

    print("The area of the room is \(area).")

}

calculateArea(12, width: 10)

// Notice that "length:" is not included in front of 12, but "width:" is included in front of "10"
// This is because the first parameter (height) does not need to be labeled, only the parameters after the first one

Function with 3 parameters:

func calculateVolume(length: Int, width: Int, height: Int) {

    let volume = length * width * height

    print("The volume of the room is \(volume).")

}

calculateVolume(12, width: 10, height: 2)

// Notice that "length:" is not before "12" because it's the first parameter, but the following parameters are "width:" and "height:"

This pattern continues. Therefore, if a function had 10 parameters, the first would not be labeled, but the next 9 parameters would when you called the function. Same thing goes for a function will 1000 parameters, only the 999 parameters following the first would be labeled. Hope this helps!