Pointers are a language feature.
A pointer is a programming language object that stores the memory address of another value located in computer memory.
Languages without Pointers include Java, JavaScript, Python
Languages with Pointers include C, C++, Go, C#, Objective-C, COBOL, Ada, D, Eiffel, Modula-2, Oberon, PL/I, FreeBASIC, Felix, BlitzMax, Fortran 90
int *ptr;
int *p;
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
}
// Pointers supported only under certain conditions.
// Get 16 bytes of memory from the process's unmanaged memory
IntPtr pointer = System.Runtime.InteropServices.Marshal.AllocHGlobal(16);
var x = 1;
&x <- 2;
type real_list_t
real :: sample_data(100)
type (real_list_t), pointer :: next => null ()
end type
type (real_list_t), target :: my_real_list
type (real_list_t), pointer :: real_list_temp
real_list_temp => my_real_list
do
read (1,iostat=ioerr) real_list_temp%sample_data
if (ioerr /= 0) exit
allocate (real_list_temp%next)
real_list_temp => real_list_temp%next
end do