swift -基础1

基础学习建议使用playground(右边便可以看到结果)

var str = "Hello, playground"

var number = 20

var num = 30

print("hello\(num+number)",terminator:"") 加上terminator:""，可以去掉打印出来的\n

var name : String ="我"

var myName = name +String(num)

let myArray = ["你","我","他"]  数组

let  diction = ["12":"qw","34":"56"]字典

var qq = myArray[1]

var n = diction["12"]

for iteminmyArray  for循环

{

    var l = item

    print("\(l)")

    

}

print("\(myArray.count)")

func getName(name:String) ->String {方法

    return name;

}

getName("tt")