Non-blocking channel in go

I have some code like this:

go func(ch chan bool) chan bool {

    // some processing
    ch <- true
    return ch

for i := 0; i < TotalQuestions; i++ {
    // check if channel ch has some value
    // If it has then execute below statements, else break out of the loop

    answer, _ := InputReader.ReadString('\n')

    // some processing

fmt.Println("Your Total score is " + strconv.Itoa(TotalScore) + " out of " + strconv.Itoa(TotalQuestions))

Now what I want to do is to check if channel ch has a value (in for loop). If it has a value then I want to break out of the for loop to print the last statement. otherwise, I want to continue my loop. I tried to insert select block but that didn't work (The channel got blocked and code didn't print questions). How to do that?


  • package main
    import (
    func main() {
        // user score, no.of questions asked so far
        var score, num int
        var correct bool // temporary variable to decide if the answer is right
        // questions
        var questions = make([]string, 13)
        t1 := time.Tick(time.Second * 7) // timer loop:
        for {
            select {
            case <-t1:
                log.Println("ran out of time")
                break loop
                // have any questions further questions to ask
                if num < len(questions) {
                    // simulate typing
                    time.Sleep(time.Millisecond * 777)
                    // correct or wrong answer
                    correct = (rand.Intn(777)%2 == 0)
                    if correct {
                        fmt.Println("you did it")
                        score++ //increase score
                    } else {
                        fmt.Println("try again")
                } else {
                    // no questions, state and break
                    log.Println("all questions were finished")
                    break loop //break loop, all questions were finished
        //print final score
        fmt.Println("your score is:", score)