swift学习－（for in）循环

for in 循环是比较常用的循环结构，常用在遍历当中，下面是它一些简单的用法。

// for in 循环可以加区间        for a in 1...5 {            print(a)        }

//  遍历数组        for b in ["a", "b", "c", "d"] {            print(b)        }

//  遍历字典        for (c,d) in ["adress":"广州","company":"公司"] {            print("\(c):\(d)")        }        for e in ["adress":"广州","company":"公司"] {            print(e)        }