Swift_声明变量var、常量let

//TODO:打印
func prin(){

print("hello work")
print("sub = \(sub)")

}

//TODO:声明变量、常量
func verLet(){

//let 常量修饰符
let a = 10    //整型
let b = 11.2  //浮点
let c = true  //布尔
let d = String(a) + "test"  //字符串
var e = ["d","aa"]
var dic = ["a":"1","b":"e"]
dic["d"] = "d"

//ver 变量修饰符
var f = 10
f = 11
var g = e
g[0] = "sd"

}