go_async_part2.go

package main

import (
	"fmt"
	"net/http"
)

func main() {
	// A slice of sample websites
	urls := []string{
		"https://www.easyjet.com/",
		"https://www.skyscanner.de/",
		"https://www.ryanair.com",
		"https://wizzair.com/",
		"https://www.swiss.com/",
	}
	for _, url := range urls {
		go checkUrl(url)
	}
}

//checks and prints a message if a website is up or down
func checkUrl(url string) {
	_, err := http.Get(url)
	if err != nil {
		fmt.Println(url, "is down !!!")
		return
	}
	fmt.Println(url, "is up and running.")
}