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iOS Swift Enums and Structs Structs and their Methods Struct Methods

Mark Weiser
Mark Weiser
2,093 Points
Posted by Mark Weiser
Mark Weiser
2,093 Points

Trouble with 'init' on step 2

I added an init for "amount" variable but it doesn't seem to read. Stuck in the mud on this one!

struct.swift 
struct Expense {
    var description: String
    var amount: Double = 0.0
    var percentage: Double = 0.0

    init (description: String, percentage: Double, amount: Double) {
        self.description = description
        self.percentage = percentage
        self.amount = amount
        }


    func calculateTaxes(percentage: Double) -> Double {
          return "\(self.amount * (percentage/100))"
        }
}

1 Answer

Chris Stromberg
PLUS
Chris Stromberg
Courses Plus Student 13,389 Points
Chris Stromberg
Chris Stromberg
Courses Plus Student 13,389 Points

The variable description needs to be initialized.

You can: Assign it a value: var description = " "

or

Make it an optional: var description: String?

Also check your return type for your function.

The function signature states it returns a double, but your code returns a string.

func calculateTaxes(percentage: Double) -> Double { return (self.amount * (percentage/100)) }

or

func calculateTaxes(percentage: Double) -> String { return "(self.amount * (percentage/100))" }

Mark Weiser
Mark Weiser
2,093 Points
Mark Weiser
Mark Weiser
2,093 Points

Thanks for the help Chris. I actually also tried

func calculateTaxes(percentage: Double) -> Double { return (self.amount * (percentage/100)) }

last night and it wasn't working. Tried it today and it worked fine, so I'm thinking it was a Treehouse glitch.