What are the rules of pointer arithmetic?

Can you explain the rules of pointer arithmetic?

Sure! Pointer arithmetic allows you to perform operations on pointers, such as addition and subtraction.

What happens when you add an integer to a pointer?

When you add an integer to a pointer, it moves the pointer forward by that many elements of the type it points to.

And what about subtracting a pointer from another pointer?

Subtracting one pointer from another gives you the number of elements between them, assuming they point to the same array.

Are there any rules I should be aware of when using pointer arithmetic?

Yes, you should only perform pointer arithmetic on pointers that point to the same array or one past the last element.