Go has pointers. A pointer holds the memory address of a value.
The type *T is a pointer to a T value. Its zero value is nil.
var p *int
The & operator generates a pointer to its operand.
i := 42
p = &i
The * operator denotes the pointer's underlying value.
fmt.Println(*p) // read i through the pointer p
*p = 21 // set i through the pointer p
This is known as "dereferencing" or "indirecting".
Unlike C, Go has no pointer arithmetic.
package main
import "fmt"
func 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
}