Ticker in Go

ticker.go

package main

import (
	"flag"
	"io"
	"log"
	"os"
	"strconv"
	"time"
)

var (
	interval = flag.Int("i", 1000, "interval in milliseconds")
	start    = flag.Int("s", 1, "start sequence")
)

func main() {
	flag.Parse()

	ticker := time.NewTicker(time.Millisecond * time.Duration(*interval))
	defer ticker.Stop()

	c := *start
	for range ticker.C {
		s := strconv.Itoa(c)
		_, err := io.WriteString(os.Stdout, s+"\n")
		if err != nil {
			log.Fatal(err)
			break
		}
		c++
	}
}