//: Playground - noun: a place where people can play

import UIKit

// for-in

for i in -99...99

{

    i * i

}

let array = ["Rinpe", "Bobo", "Lili"]

for (index, name) in array.enumerate()

{

    print("\(index), \(name)");

}

for (_, name) in array.enumerate()

{

    print("\(name)")

}

let dict = [1:"Rinpe", 2:"Bobo", 3:"Lili"]

for (key, value) in dict {

    print("\(key) - \(value)")

}

// for

for var i = 0; i <= 100; i++

{

    i * i

}

// while

var i = 100;

while i > 0     // 符合这个条件才循环下去

{

    i--

}

// do-while(无论条件是否符合, 都会执行一次)

i = 100

repeat

{

    i--

} while i == 100

i