Три append внутри функции

1package main2 3import "fmt"4 5func main() {6	data := []int{4, 5, 6}7	fmt.Println(data, len(data), cap(data))8	grow(data)9	fmt.Println(data, len(data), cap(data))10}11 12func grow(data []int) {13	data = append(data, 7)14	data = append(data, 8)15	data = append(data, 9)16}