gistfile1.go

package main

import (
  "fmt"
)

var eventChannel chan int = make(chan int)

func sayHello() {
  fmt.Println("Hello, world!")

  //pass a message through the eventChannel
  //it doesn't matter *what* we actually send across
  eventChannel <- 1
}

func main() {

  //run a goroutine that says hello
  go sayHello()

  //read the eventChannel
  //this call blocks so it waits until sayHello()
  //is done
  <- eventChannel
}