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iOS Swift Enums and Structs Structs and their Methods Struct Methods

Posted by Anthony Woodman
Anthony Woodman
1,460 Points

How to i call the method on the item variable?

I am stuck on the step where i need to call the method on the item variable...which property of item do i call the method on?

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

var taxes = calculateTaxes(7.5)

thanks

Lee

struct.swift 
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: "Something here")
item.amount = 100

var taxes = calculateTaxes(7.5)

2 Answers

Alvin Abia
Alvin Abia
Courses Plus Student 23,034 Points

Hey Lee,

You can access functions using dot notation. So if you are trying to invoke calculateTaxes on your variable item with a percentage of 7.5, you would do so like this.

var taxes = item.calculateTaxes(7.5)
Vrund Patel
Vrund Patel
11,994 Points
Vrund Patel
Vrund Patel
11,994 Points

It should be

var taxes = item.calculateTaxes(7.5)

Full code below: 

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: "HelloWorld")
item.amount = 100
var taxes = item.calculateTaxes(7.5)

Hope this helps,

Vrund