NULL POINTER

NULL POINTER

            A pointer variable can also be initialized in such a way that it does not point to any data type.  Such a pointer is known as a NULL pointer.

            A null pointer is a special type of pointer that cannot points to anywhere.  Null pointer is assigned by using the predefined constant NULL; which is defined by several header files including stdio.h, stdlib.h and alloc.h.

            Example:        int *p=NULL;

/* EXAMPLE PROGRAM FOR NULL POINTER */

#include<stdio.h>

main()

{

            int *p;

            clrscr();

            p=NULL;

            printf("\nValue :%d",*p);

}