swift的控制语句

1 for循环语句的例子

//定义一个分数

var score=80;

//定义一个数组

var scores=[90,98];

var minScord=0;

var maxscore=0;

var avgscore=0.0;

var count=scores.count;

var sumscore=0.0;

//循环数组中所有数据

for s inscores

{

sumscore=sumscore+Double(s)

println("s is \(s)");

}

println("sumscore is\(sumscore)")

2 do while 循环语句例子

var index=0;

do{

var s=scores[index]

index++

println(s)

}while(index<count)

3 while 循环语句

while (index<count)

{

var ss=scores[index]

println("while s\(ss)")

}

//switch切换语句

let appType = "IOS"

switch appType {

case "IOS":

println("IOS开发");

fallthrough;//不让往下走

case "ANdroid":

println("Android开发")

case "windowPhhone":

println("WIndow Phone")

default:

break;

};

1 for循环语句的例子 //定义一个分数 var score=80; //定义一个数组 var scores=[90,98]; var minScord=0; var maxscore=0; var avgscore=0.0; var count=scores.count; var sum