Concurrency in Go: Go routines example - 1

main.go

package main

import (
	"fmt"
	"time"
)

func main() {
	go counter("first")
	counter("second")
}

func counter(rank string) {
	for i := 1; ; i++ {
		fmt.Println(i, rank)
		time.Sleep(time.Second * 1)
	}
}