package mainimport (    "fmt"    "time")func NewTask()  {    for true {        fmt.Println("this is a newtesk goroutine")        time.Sleep(time.Second) //延时1    }}func main() {    //一定要写在下面的死循环之前    go NewTask()//使用go关键字新建一个协程    for true {        fmt.Println("this is a main goroutine")        time.Sleep(time.Second) //延时1    }    //NewTask()//如果按照这里的写法，这个方法肯定不会被调用到的}

执行的结果

this is a main goroutinethis is a newtesk goroutinethis is a newtesk goroutinethis is a main goroutinethis is a main goroutinethis is a newtesk goroutinethis is a main goroutinethis is a newtesk goroutinethis is a main goroutinethis is a newtesk goroutine///

 这里有一点需要注意的是：在一个程序启动时，其主函数即在一个单独的goroutine中运行，我们叫它main goroutine,新的goroutine会用go语句来创建，当主协程(main goroutine)退出时，其它的子协程也会退出，验证一下

package mainimport (    "fmt"    "time")func main() {    go func() {        i := 0        for true {            i ++            fmt.Println(" 子协程 i = ", i)            time.Sleep(time.Second)        }    }()    i := 0    for true {        i ++        fmt.Println(" 主协程 i = ", i)        time.Sleep(time.Second)        if i == 2{            break        }    }}

 执行结果

主协程 i =  1 子协程 i =  1 主协程 i =  2 子协程 i =  2

 被调用的匿名函数是无限循环，当主协程退出时，子协助就算是无限循环也退出了