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iOS Swift Enums and Structs Structs and their Methods Struct Methods

becky hayes
becky hayes
2,226 Points

Not sure whats wrong with my syntax here

Was asked to 'call the method calculateTaxes on the variable 'item' and then assign the result to a new variable named taxes

struct Expense {
    var description: String
    var amount: Double = 0.0

    init (description: String) {
        self.description = description

  func calculateTaxes (percentage: Double) -> Double {
  return (self.amount * (percentage/100))
var  item = Expense (description: "Rent")
item.amount = 100
item.calculateTaxes = (var taxes)

1 Answer

Martin Wildfeuer
Martin Wildfeuer
Courses Plus Student 11,071 Points

item is an instance of your Expense struct. With structs/classes you can set/get variables via dot notation, just as you do here:

item.amount = 100

The same is true for functions, so calling calculateTaxes on an instance of a struct/class you would do the following:

var taxes = item.calculateTaxes(7.5)

As your function returns a Double you can assign it to a variable (well, and constants ;)

Hope that helps :)