main.go

package main

import (
	"fmt"
	"time"
)

func printHello() {
	time.Sleep(time.Millisecond)
	fmt.Println("Hello World!")
}

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

	// create goroutine
	go printHello()

	// schedule another goroutine
	time.Sleep(10 * time.Millisecond)
	fmt.Println("main execution stopped")
}