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)
        }