select里面的break是无法退出for语句的。如下；

package mainimport (   "fmt")func main() {   var c=make(chan int,1024)   quit:=make(chan string,1)   c<-1   quit<-"q"   for{      select{         case <-c:            fmt.Println("here")         case <-quit:            fmt.Println("quit")            break      }   }}

有几种方法可以退出for循环

1使用goto语句：

package mainimport (   "fmt")func main() {   var c=make(chan int,1024)   quit:=make(chan string,1)   c<-1   quit<-"q"   for{      select{         case <-c:            fmt.Println("here")         case <-quit:            fmt.Println("quit")            goto forEnd      }   }   forEnd:}

2使用break标签

package mainimport (   "fmt")func main() {   var c=make(chan int,1024)   quit:=make(chan string,1)   c<-1   quit<-"q"   forEnd:   for{      select{         case <-c:            fmt.Println("here")         case <-quit:            fmt.Println("quit")            break forEnd      }   }}

3使用return语句

package mainimport (   "fmt")func main() {   var c=make(chan int,1024)   quit:=make(chan string,1)   c<-1   quit<-"q"   some(c, quit)   fmt.Println("end")}func some(c1 chan int,c2 chan string)  {   for{      select{         case <-c1:            fmt.Println("here")         case <-c2:            fmt.Println("quit")            return      }   }}