Destructors in c++

What is destructor?
Destructor is a member function which destructs or deletes an object.

When is destructor called?
A destructor function is called automatically when the object goes out of scope:
(1) the function ends
(2) the program ends
(3) a block containing local variables ends
(4) a delete operator is called 

How destructors are different from a normal member function?
Destructors have same name as the class preceded by a tilde (~)
Destructors don’t take any argument and don’t return anything

class String 
{ 

private: 

    char *s; 

    int size; 

public: 

    String(char *); // constructor 

    ~String();      // destructor 
}; 
  

String::String(char *c) 
{ 

    size = strlen(c); 

    s = new char[size+1]; 

    strcpy(s,c); 
} 
  
String::~String() 
{ 

    delete []s; 
}