channels.go

package main

import (
	"fmt"
	"os"
	"time"
)

func main() {
	c := make(chan int)
	fmt.Println("Program started")
	go func() {
		fmt.Println("Enter goroutine")
		time.Sleep(time.Duration(3) * time.Second)
		c <- 1
		fmt.Println("Exit goroutine")
	}()
	fmt.Println("Main thread... waiting for result")
	for {
		select {
		case <-c:
			fmt.Println("Got result, exiting loop")
			os.Exit(0)
		default:
			time.Sleep(time.Duration(500) * time.Millisecond)
			fmt.Print(".")
		}
	}
}