What result will program №12 output

What will be the output of the program after its execution?

func main() {
    s := make([]int, 0, 3)
    s = append(s, 1)
    s = append(s, 2)
    add(s)
    fmt.Printf("%v", s)
}

func add(s []int) {
    s = append(s, 3)
    s = append(s, 4)
}