forをchanを使って途中で止める(スレッドセーフ)

temp.go

package main

import (
	"log"
	"time"
)

func temp(quitChan chan bool) {
	for i := 0; i <= 1000000; i++ {
		select {
		case <-quitChan:
			return
		default:
			log.Println(i)
		}

		time.Sleep(10 * time.Millisecond)
	}
}

func main() {
	c := make(chan bool)
	go temp(c)
	time.Sleep(2 * time.Second)
	close(c)
	time.Sleep(2 * time.Second)
}