func getFirstLast(ar []int) (int, int) {
var first = -1
var last = -1
if len(ar) > 0 {
first = ar[0]
last = ar[len(ar)-1]
}
return first, last
}
var ar = []int{2, 3, 5}
first, last := getFirstLast(ar)
//first is 2
//last is 5
fmt.Println("first =", first)
fmt.Println("last =", last)