To where does a pointer point after being deleted?

Question

When we use delete for a pointer (delete p;), and don't use nullptr for it then, it points to some else location in memory. Can that new location have a valid value so that we can use it in the code?

Answer 1

Whether a pointer points to the same location or a different location after it has been deleted is not specified by the language. An implementation is free to do whatever they wish to do with the value of that pointer.

Can that new location have a valid value so that we can use it in the code?

That's up to your code. The compiler is not required to do so.