管道的关闭和便利案例

package main
func main() {
    var myChan chan int;
    myChan = make(chan int ,10);
    //添加管道
    myChan <- 10;
    myChan <- 20;
    myChan <- 30;
    close(myChan);//关闭管道

}

package main
import "fmt"
func main() {
    var myChan chan int;
    len:=100;
    myChan = make(chan int ,len);
    //批量向管道添加数据
    for i:=0;i <len;i ++{
        myChan <- i;
    }
    close(myChan);//必须关闭i管道后才可以
    for v:=range myChan {
        fmt.Println(v*2);
    }
}