codewars/go/habr/channel_nil.go

package main

import (
	"fmt"
)

func service(c chan string) {
	c <- "responce"
}

func main() {
	fmt.Println("main() started")

	var chan1 chan string

	go service(chan1)

	select {
	case res := <-chan1:
		fmt.Println("Response from chan1", res)
	default:
		fmt.Println("No response")
	}

	fmt.Println("main() stopped")
}