Answer Posted / abi

Yes there are differences between a null pointer and a void
pointer. As you know that a pointer holds the memory address
of any variable . So we can say for a null pointer that :

- A null pointer can be of any primitive type(e.g - int *
,char * etc)

-However a null pointer does not point to any memory
location , i.e. it does not contain a reference of any
variable/value. Hence we may state that it has a NULL as its
value making it a null pointer.

Where as in case of a void pointer we can say :

- void pointer is always of type void *

- Mainly such pointers are used for dynamic memory
allocations (using malloc(), calloc() and realloc()
functions) , where memory block reserved is pointer to by a
void pointer and as the pointer value is returned it has to
be explicitly type casted to a particular desired type.

for e.g

int * ptr;

ptr=(int *) malloc(sizeof(int));

[ Here malloc () returns a pointer of void * type(i.e a void
pointer) which is type casted to int * as per our requirement ]

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