(1)加減乘除
(2)三目運算,切記後面的空格如果不加會報錯的。估計是蘋果的bug。
(3)聚合運算符,省卻了一個判斷,很人性化
(4)區間運算符
//加減乘除等等
let a = 2
let b = 3
var c = 0
c++
++c
c+=2
c-=2
c*=2
c/=2
//三目運算符
a==b ? "x" : "y"
//nil聚合運算符
var sa:String? = "a"
var sb:String = "b"
sa = nil
sa ?? sb
//區間運算符
//閉區間
for index in 1...10 {
println(index)
}
//半閉區間
for index in 1..<10 {
println(index)
}
let arr = ["x","y","z"]
for i in 0..<arr.count{
println(arr[i])
}