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What are the characteristics of friend functions?Friend functions are not a part of the class and are external. This function is a “Friend” of a class. This is to say, it has special privileges to access to the class's private and protected members.What are the characteristics of friend functions?- A friend function is not in the scope of the class, in which it has been declared as friend.
- It cannot be called using the object of that class.
- It can be invoked like a normal function without any object.
- Unlike member functions, it cannot use the member names directly.
- It can be declared in public or private part without affecting its meaning.
- Usually, it has objects as arguments.
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