When to use inout parameters?

Question

When passing a class or primitive type into a function, any change made in the function to the parameter will be reflected outside of the class. This is basically the same t

Answer 1

when use inout parameter swift 4.0 Work

class ViewController: UIViewController {

    var total:Int = 100

    override func viewDidLoad() {
        super.viewDidLoad()
        self.paramTotal(total1: &total)
    }

    func paramTotal(total1 :inout Int) {
        total1 = 111
        print("Total1 ==> \(total1)")
        print("Total ==> \(total)")
    }
}