Scala 循环

环境： CentOS 6.3

不解释，看例子，自己琢磨。

1. While 循环

$ cat while.scala

var i = 10;

while ( i > 0 ) {

println("this is number " + i);

i = i -1;

}

$ scala while.scala

this is number 10

this is number 9

this is number 8

this is number 7

this is number 6

this is number 5

this is number 4

this is number 3

this is number 2

this is number 1

2. foreach 循环

$ cat foreach.scala

var array=new Array[String](3)             //创建数组并初始化

array(0) = "hello"

array(1) = "nihao"

array(2) = "ma?"

array.foreach(arr => println(arr))        // 用foreach 循环输出数组内容  arr是指array里面每个元素的参数，scala 会推断是string

//array.foreach((arr:String) => println(arr))  //也可以显示指定arr类型

3. for 循环

$ cat for.scala

for(arg<-args)

println(arg)

$ scala for.scala this is China

this

is

China

总结,函数式文本的语法：

Scala 循环,布布扣,bubuko.com