Why destructor is used in the class??

Question

As per I know destructor is used to destroy the object. But I didn't get it completely. Can someone explain destructor elaborately??

Answer 1

Any instance you create, will be destroyed when it stops to be valid. (For example, the function call, in which it was declared, ends.)

By defining a destructor by hand, you can say what exactly is supposed to happen when an instance is destroyed.

Sometimes that's important, for example when the instance requires memory manually, or opens a file or something like that.