2022-07-18: what is the output of the following go language code? A：Groutine； B：Main； C：Goroutine； D：GoroutineMain。 package m

2022-07-18： following go What language code outputs ？A：Groutine;B：Main;C：Goroutine;D：GoroutineMain.

package main

import (
    "fmt"
    "time"
)

func main() {
    ch := make(chan bool)
    go func() {
        <-ch
        fmt.Print("Goroutine")
    }()
    time.Sleep(2 * time.Second)
    close(ch)
    time.Sleep(3 * time.Second)
    fmt.Print("Main")
}

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answer 2022-07-18：

Answer selection D. close channel after ,<-ch Will return to .

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