Function Overloading - Rules in Function Overloading

Rules in Function Overloading

• The overloaded function must differ either by the arity or data types.
• The same function name is used for various instances of function call.

It is a classification of static polymorphism in which a function call is resolved using the 'best match technique ', i.e., the function is resolved depending upon the argument list. Method overloading is usually associated with statically-typed programming languages which enforce type checking in function calls. When overloading a method, you are really just making a number of different methods that happen to have the same name. It is resolved at compile time which of these methods are used.

Method overloading should not be confused with forms of polymorphism where the correct method is chosen at runtime, e.g. through virtual functions, instead of statically.

Example: function overloading in c++