Pointer in C

• It is used to reduce the code and performance.
• It accesses the direct address of the variable.
• It is used to return multiple values from the function.
• It helps us to access any memory location from the pointer.

int *ptr;
 char *ch;

#include<stdio.h>
int main ()
{
int n=100;
int *ptr; // pointer variable
printf("Address of num variable: %x\n", &n);
printf("Address stored in ptr variable: %x\n", ptr ); // address stored in 
pointer variable
printf("Value of *ptr variable: %d\n", *ptr ); //access the value using the 
pointer
return 0;
}

Address of num variable: f64b7adc
Address stored in ptr variable: f64b7bd0
Value of *ptr variable: 1

int *ptr=NULL;