Answer 1

Usually, friend overloading is used for the << or the >> to bind our objects to a stream so that we can use cin, cout or any other stream to receive and display input/output.

The reason this is done is as the <</>> operator must belong to the ostream/istream class, and we need them to be able to access the private members of the class we are overloading the operators for to perform input/output. Thus, we use friend operators.