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iOS Swift Enums and Structs Structs and their Methods Struct Methods

what value should i give to var taxes?

please some one help!!

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/100.00)



var item = Expense(description: "hello")
item.amount = 7.5
item.calculateTaxes(percentage: Double)
var taxes = calculateTaxes(percentage)

1 Answer

150,854 Points

Hi David,

Challenge 3 asks us to set item.amount to 100, so we'll do that.

As for Challenge 4, we'll pass in 7.5 as an argument to the calculateTaxes method (this 7.5 will be the tax percentage, as you've defined in the calculateTaxes method's header.) We need to specify our variable of item when calling this method (which is an instance of Expense), because item's amount property holds the value that we want to calculate taxes on.

var item = Expense(description: "hello")
item.amount = 100
var taxes = item.calculateTaxes(7.5)

Hope this helps!