1 import Foundation 2  3 // 数组声明 4 var arr = [String]() 5 // 数组循环添加项 6 for var index in 0...100{ 7     arr.append("Item \(index)") 8 } 9 10 // 遍历方法111 for item in arr {12     print (item)13 }14 // 遍历方法215 for (index, value) in arr.enumerate() {16     print("Item \(index + 1 ) :\(value)")17 }18 19 print("Hello, World!")

 

1 var i = 1002 while i < arr.count{3     print(arr[i])4     i++5 }6 7 8 print(arr[25])

1 // 字典的遍历2 var dict = ["name":"jinpangpang","age":"16"]3 for (key,value) in dict{4     print("\(key),\(value)")5 }