Concepts of pointers

#1

please describe what is a null pointer and what is dangling pointer?

#2

@deck123
NULL pointer is a pointer which do not point to any location.

Lets say a pointer is pointing to memory location, then the memory gets freed, now that memory location in invalid. then you call the pointer pointing to that memory location a dangling pointer.

#3

ok, suppose I declare a pointer and do not define it so this is what is called null pointer!?

#4

No that would be wild pointer,
if you assign it to NULL, then it would be null pointer.