goroutine lifecycle

goroutine.go

package main

import (
	"fmt"
	"time"
)

func sync() {
	time.Sleep(time.Second / 2)
	fmt.Println("1")
	time.Sleep(time.Second)
	fmt.Println("3")
	time.Sleep(time.Second)
	fmt.Println("5")
	time.Sleep(time.Second)
}

func main() {
	go sync()
	fmt.Println("0")        // fmt.Println("1")
	time.Sleep(time.Second) // time.Sleep(time.Second)
	fmt.Println("2")        // fmt.Println("3")
	time.Sleep(time.Second) // time.Sleep(time.Second)
	fmt.Println("4")        // fmt.Println("5")
	time.Sleep(time.Second) // time.Sleep(time.Second)
	fmt.Println("end")
}