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William Hartvedt Skogstad
5,857 PointsI can't figure out where to put the tax percentage.
We need to figure out the tax amount when the tax percentage is 7.5 percent. Call the method calculateTaxes on the variable item and 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
}
// add the calculateTaxes method here
// it should accept only one parameter named 'percentage' of type Double
func calculateTaxes (percentage: Double) -> Double {
return (self.amount * (percentage/100))
}
}
var item = Expense(description: "Gains")
item.amount = 100.0
var taxes = Expense.calculateTaxes(item)
1 Answer
Brendan Whiting
Front End Web Development Techdegree Graduate 84,738 Pointsyou're calling the calculateTaxes() function on Expense, but you should be calling it on item. Expense is the abstract sctruct, item is the real life instance of an Expense. And then 7.5 is the argument you pass into that function. When you defined this function, you specified that it takes a parameter called percentage which is a Double, and it calculates the taxes based on that number. So inside the parentheses is where you put that number when you call it in real life.
So the code would look like this:
var taxes = item.calculateTaxes(7.5)