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iOS Swift Enums and Structs Structs and their Methods Struct Methods

Cant figure this out

"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."

Someone please help we

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

2 Answers

Martin Wildfeuer
PLUS
Martin Wildfeuer
Courses Plus Student 11,071 Points

This should do it:

var taxes = item.calculateTaxes(7.5)
How does this work?

You created an instance of the Expenses struct and assigned it to the variable item before. Now you have access to all methods of this struct via the item variable.

struct Expense {
    var description: String
    var amount: Double


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

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


}
var item = Expense(description: "Car", amount: 500)

item.calculateTaxes(7.5)

Would you be looking for something like this?