Solution Review: Map the Days

package main
import (
	"fmt"
)
var Days = map[int]string{
	1:"Monday", 
	2:"Tuesday",
	3: "Wednesday",
	4: "Thursday",
	5: "Friday",
	6: "Saturday",
	7: "Sunday"} 
func findDay(n int) string {
	val,isPresent := (Days[n])
	if isPresent{		// what if key is not present
		return val
	}else{
		return "Wrong Key"}	// return wrong key if invalid key
}
func main() {
	n := 4
	fmt.Println(n,":",findDay(n))
	n = 0
	fmt.Println(n,":",findDay(n))
}