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iOS Swift Enums and Structs Structs and their Methods Struct Methods

Posted by Zach Schapiro
Zach Schapiro
1,060 Points

Challenge Task 4/4

This error message shows: 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. Bummer! Your code could not be compiled. Please click on "Preview" to view the compiler errors.

struct.swift 
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))
    }

    // add the calculateTaxes method here
    // it should accept only one parameter named 'percentage' of type Double
}

  var item = Expense(description: "Busisness")
  item.amount = 100

  var taxes = calculateTaxes(7.5)

1 Answer

Holger Liesegang
Holger Liesegang
50,595 Points
Holger Liesegang
Holger Liesegang
50,595 Points

Hi Zach Schapiro !

You only forgot item in item.calculateTaxes(7.5) by mistake:

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: "My description")
item.amount = 100

var taxes = item.calculateTaxes(7.5)