func appendSlice(sl []int, val int) { sl = append(sl, val) } func mutateSlice(sl []int, idx, val int) { sl[idx] = val } package main import "fmt" type Person struct { Name string } func changeName(person *Person) { person = &Person{ Name: "Alice", } } func main() { person := &Person{ Name: "Bob", } fmt.Println(person.Name) // changeName(person) fmt.Println(person.Name) // }