Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Swift Enums and Structs Structs and their Methods Struct Methods

Abraham Zamudio
Abraham Zamudio
1,896 Points

Swift Enums and Structs

I'm stuck on this last challenge and I need some help, Challenge Task 4 of 4

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.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)
    }


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

1 Answer

Jhoan Arango
Jhoan Arango
14,575 Points

Hello : Sorry I am not looking at the challenge and trying it out myself, but I will try to help you with what I can see the challenge is asking you for.

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: "car")
item.amount = 100
var taxes = item.calculateTaxes(7.5) // Here

// we are calling the method and assigning it to a variable 
// called taxes

Try this out, and please let me know if that works for you.