p := Vertex{1, 2} // p is a Vertex
q := &p // q is a pointer to a Vertex
r := &Vertex{1, 2} // r is also a pointer to a Vertex
// The type of a pointer to a Vertex is *Vertex
var s *Vertex = new(Vertex) // new creates a pointer to a new struct instance& address of / create pointer
* dereference pointerfunc main() {
i, j := 42, 2701
p := &i // point to i
fmt.Println(*p) // read i through the pointer
*p = 21 // set i through the pointer
fmt.Println(i) // see the new value of i
p = &j // point to j
*p = *p / 37 // divide j through the pointer
fmt.Println(j) // see the new value of j
}func main () {
b := *getPointer()
fmt.Println("Value is", b)
}package main
import "fmt"
func main() {
// create a normal string variable
name := "original"
// pass in a pointer to the string variable using '&'
setName(&name, "boot.dev")
fmt.Println(name)
}
func setName(ptr *string, newName string) {
// dereference the pointer so we can modify the value
// and set the value to "boot.dev"
*ptr = newName
}