go_concurrency

//program
func do(s string, i int) {
	fmt.Printf("%s_%d\n", s, i)
}

func main() {
	for i := 0; i < 5; i++ {
		go do("Hello", i)
		go do("World", i)
	}
}

//always the same output with GOMAXPROCS=1
World_4
Hello_0
World_0
Hello_1
World_1
Hello_2
World_2
Hello_3
World_3
Hello_4