普通for循环

//传统写法
for var i = 0; i < 10; i++ {
    print("the current i Value: \(i)")
}

//swift3.0推荐写法
for i in 0 ..< 10 {
    print("the current i Value: \(i)")
}

运行结果：

forin循环

let numbers = [0,1,2,3,4]
for var i in numbers {
    print(i)
}

let names = ["hell0","world","let's","start"]
for var string in names {
    print(string)
}

运行结果：

while循环

var j = 0
while j < 5 {
    j += 1
    print(j)
}

运行结果：

代码下载

https://github.com/99ios/SwiftBasic

视频教程

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