体系

1.Tuples元组

定义: 将多个不同的值集合成一个数据

特点：可以任意多值｜不同的值可以是不同类型

let Tuples  = (123,"jiangchao")
print("元组的元素\(Tuples.0)")


let (left,right) = Tuples
print("元组第二种方法\(right)")


//使用下划线_忽略部分数值
let loginResult = (true,"jiangchao")
let (isLoginSuccess,_) = loginResult
if isLoginSuccess {
    print("登陆成功")
}

2.循环运算符
For in
a...b a..<b

for index in 1...10{
    print(index)
}

let names = ["唐僧","孙悟空","猪八戒","沙悟净"];
for i in 0..<names.count{
    names[i]
}