Program to get the IP Address and Hostname

main.go

package main
import (
	"log"
	"net"
	"os"
)
func main() {
	hostname, _ := os.Hostname() // get hostname
	addrs, err := net.LookupIP(hostname) // returns a slice of the IP addresses of the host 
	// lookupIP looks up host using the local resolver. It returns a slice of that host's IPv4 and IPv6 addresses.
	if err != nil {
		log.Println("Failed to detect machine host name. ", err.Error())
		return
	}
	log.Println("All Addrs: ", addrs)
	var ip string
	for _, addr := range addrs {
		if ipv4 := addr.To4(); ipv4 != nil {
			// only take the class B address
			if ipv4[0] == 172 {
				ip = ipv4.String()
				break
			}
		}
	}
	log.Println("Host name: ", hostname)
	log.Println("IP: ", ip)
}