Polymorphism

If a function behaves differntly for different objects then this is known as polymorphism. Function overloading is an example of polymorphism.

Method Overloading

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The functions having the same name but have different numbers of parameters passed to it, which can have different data types like int, double, float and used to return different values are known as overloaded method. This process is known as function overloading

Consider the above two declarations :

The above mentioned two methods have the same name but different parameter declaration if you call min() with int parameter then min() method that expects int parameter will be invoked and if you call min() with double parameters the min() method that expects double parameters will be invoked. This referred to as method overloading and method min() is said to be overloaded

Advantages of Method Overloading

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(i) Overloading provides the ability to create multiple methods of the same name, but with different parameters.
(ii) The main advantage of this is cleanliness of code.
(iii) It increases the readability of the program.

Defining Overloaded Methods

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You can overload a method by two ways :

(i) By changing the no. of arguments.

(ii) By changing the data types.

Invoking Overloaded Methods

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In this example, we have created four overloaded methods (first three method overload by changing no. of arguments and last one method overloaded by changing there data type).