A destructor is a function that is called when an object is destroyed. A destructor is a way to clean up after an object has been destroyed. When an object is destroyed, the memory associated with the object is released. When an object is created, the memory associated with the object is allocated. The destructor is called when the memory associated with the object is no longer needed. The destructor frees up the memory associated with the object and releases it into the environment. When an object is destroyed, it can be very difficult to find out why an object was destroyed.