Swift 循环、数组 字典的遍历

 import Foundation

 // 数组声明
 var arr = [String]()
 // 数组循环添加项
 for var index in ...{
     arr.append("Item \(index)")
 }

 // 遍历方法1
 for item in arr {
     print (item)
 }
 // 遍历方法2
 for (index, value) in arr.enumerate() {
     print("Item \(index + 1 ) :\(value)")
 }

 print("Hello, World!")

 var i =
 while i < arr.count{
     print(arr[i])
     i++
 }

 print(arr[])

 // 字典的遍历
 var dict = ["name":"jinpangpang","age":""]
 for (key,value) in dict{
     print("\(key),\(value)")
 }