Solution Review: Magnify a Slice

package main
import "fmt"
var s []int
func main() {
	s = []int{1, 2, 3}
	fmt.Println("The length of s before enlarging is:", len(s))
	fmt.Println(s)
	s = enlarge(s, 5)	// calling function to magnify
	fmt.Println("The length of s after enlarging is:", len(s))
	fmt.Println(s)
}
func enlarge(s []int, factor int) []int {
	ns := make([]int, len(s) * factor)		// making a new slice of length len(s)*factor
	copy(ns, s)	// copying contents from s to new slice
	return ns
}