1- Assignment of pointers to the same type of pointers.
2- Adding or subtracting a pointer and an integer.
3-subtracting or comparing two pointer.
4-incrementing or decrementing the pointers pointing to the elements of an array. When a pointer
to an integer is incremented by one , the address is incremented by two. It is done automatically
by the compiler.
5-Assigning the value 0 to the pointer variable and comparing 0 with the pointer. The pointer
having address 0 points to nowhere at all.