/* OUTPUT
------
0x7ffebdd9a390
1
------
1
0x7ffebdd9a29c
------
(nil)
------
0x7ffebdd9a29c
0x7ffebdd9a29c
------
2
*/
#include <stdio.h>
void main(){

int integerValue = 1; //integerValue is VALUE

int* integerPointer; //integerPointer is a POINTER
printf("------\n");
printf("%p\n", integerPointer); //Outputs address OS allocated for it
printf("%d\n",*integerPointer); //Outputs whatever in that memory space from before.

printf("------\n");
printf("%d\n",integerValue); //1
printf("%p\n", &integerValue); //The address of where integerValue exists. & means the point$

integerPointer = NULL;
printf("------\n");
printf("%p\n",integerPointer); //0 or NULL basically address to nothing.
integerPointer = &integerValue; //We can assign integerValue's address to integerPointer

printf("------\n");
printf("%p\n", &integerValue); //Now both output the same address in memory
printf("%p\n",integerPointer); //You can change that memory using either variable.
*integerPointer = 2; //* means change data at pointer's location
printf("------\n");
printf("%d\n",integerValue);//integerValue is now 2 since the memory it uses was changed.
 }