Array Copy - Swift Programming

Swift arrays behave like values when a program updates a copied variable.

Append to one array

array_copy.swift

let extra = 
let first = [1, 2, 3]
var second = first
second.append(extra)
let message = "first=\(first.count), second=\(second.count), last=\(second.last!)"

print(message)

let extra = 
let first = [1, 2, 3]
var second = first
second.append(extra)
let message = "first=\(first.count), second=\(second.count), last=\(second.last!)"

print(message)

let extra = 
let first = [1, 2, 3]
var second = first
second.append(extra)
let message = "first=\(first.count), second=\(second.count), last=\(second.last!)"

print(message)

array value Updating a copied array variable does not change the earlier array variable.