请问为啥输出是4，进入的到ch里不是先进先出原则吗，我理解应该是输出是0的呀，求大神解释

package main import( "fmt" ) func main() { channelInt := make(chan int) for i:= 0; i < 5; i++ { j := i go func(j int) { channelInt <- j }(j) } fmt.Printf("==>%d\n", <-channelInt) }