/// 遍历字符串中每个字符
for i in <#defaultString#>.characters {
<#content#>
}
let dict = ["key":"value" , 0: "zero"];
/// 遍历字典
for (k, v) in <#dict#> {
print("\(k) —— \(v)")
}
//运行结果:
0 —— zero
key —— value