Swift Structs Demo

swift-structs.swift

import UIKit

struct User {
     var email: String
     var username: String
    
}

// Structs come with a prebuilt init function
var user = User(email: "[email protected]", username: "green")

// Structs copy data on write here is an example

var tom = User(email: "r", username: "s")
var jill = tom
jill.email = "blue"

print("Jill's Email: \(jill.email)")
print("Tom's Email: \(tom.email)")


// Structs can use private and public member variables but you must provide the init constructor

struct Person {
    
    public var name: String
    private var age: Int
    
    public init(_ name: String) {
        self.age = 0
        self.name = name
    }
    
    public mutating func addYear() -> Person {
        self.age += 1
        
        return self
    }
    
    public func getYear() -> Int {
        return self.age
    }
    
    private func sayHi() -> String {
        return "Hi, my name \(self.name) and I am \(self.getYear()) old"
    }
    
    public func sayHello() {
        print(self.sayHi())
    }
}


var james = Person("James")
print("HELLO")
james.addYear()
james.sayHello()