goroutine example

• go

If we call them with the go keyword they become go-routines and they start to work in parallel. So in this example you can see the output is mixed up.

package main

import (
	"fmt"
	"time"
)

func count(n int, name string) {
	for i := 0; i < n; i++ {
		fmt.Printf("%s %d\n", name, i)
		time.Sleep(1000)
	}
}

func main() {
	fmt.Println("Welcome")
	count(3, "first")
	go count(3, "second")
	go count(3, "third")
	count(3, "fourth")
	fmt.Println("Done")
}

Welcome
first 0
first 1
first 2
fourth 0
second 0
second 1
third 0
third 1
second 2
fourth 1
third 2
fourth 2
Done