Inheritance vs. Polymorphism

The difference between inheritance and polymorphism is that inheritance in computer science is creating a new class from already existing functions whereas polymorphism is a common interface for multiple forms.

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Inheritance vs. Polymorphism

If you want to learn coding and programming, you must learn the concepts of inheritance and polymorphism in computer science.  You can use one code again by using the method of inheritance and occurrence of one function more than one time and with different form is a polymorphism. Inheritance in computer science is creating a new class from already existing functions whereas polymorphism is a common interface for multiple forms. If we talk about object-oriented programming, inheritance is very important. The reusability of code is very important in computer programming; inheritance allows you to reuse the same code. In inheritance, you make a new class that inherits the base class from other function. The members of base class become the member of the derived class. If we the base case is not made public it becomes private, and inheritance cannot be done. There are five types of inheritance in C++ programming language that are single inheritance in which only one super class is made, multiple inheritance in which there are many super classes, hierarchical inheritance in which there is one super class and many subclasses and multiple inheritance which is derived from a derived class. If we talk about java, a specific keyword is used that is extends, this keyword is use to inherit class.  Polymorphism is common interface for multiple form. You can achieve polymorphism in compile time and in run time. Overloading is use polymorphism in compile whereas overriding is use to achieve polymorphism in run time. Object decide that which form of function will be used with there is compile time and run time. In overloading, function in a class is defined more than one time with different class and different data type and parameters are also different. If we talk about overriding in polymorphism Virtual keyword is used for overriding.

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Contents: Difference between Inheritance and Polymorphism

Comparison Chart

BasisInheritance Polymorphism
MeaningInheritance in computer science is creating a new class from already existing functions

Polymorphism is a common interface for multiple forms.

 

Implement Inheritance is implemented in classesPolymorphism is implemented on functions.
Types Types of inheritance are single inheritance in which only one super class is made, multiple inheritances in which there are many super classes, hierarchical inheritance in which there is one super class and many subclasses and multiple inheritances which is derived from a derived classTwo types of polymorphism, overloading and overriding
UseInheritance is used for reusability of codePolymorphism is used for a function to decide.

 Inheritance

If we talk about object-oriented programming, inheritance is very important. The reusability of code is very important in computer programming; inheritance allows you to reuse the same code. In inheritance, you make a new class that inherits the base class from other function. The members of base class become the member of the derived class. If we the base case is not made public it becomes private, and inheritance cannot be done. There are five types of inheritance in C++ programming language that are single inheritance in which only one super class is made, multiple inheritances in which there are many super classes, hierarchical inheritance in which there is one super class and many subclasses and multiple inheritances which is derived from a derived class. If we talk about Java, a specific keyword is used that is extended, this keyword is used to inherit class.

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Polymorphism

Polymorphism is a common interface for multiple forms. You can achieve polymorphism in compile time and in run time. Overloading is used polymorphism in compile whereas overriding is use to achieve polymorphism in run time. Object decide that which form of the function will be used with there is compile time and run time. In overloading, function in a class is defined more than one time with the different class, and different data type and parameters are also different. If we talk about overriding in Virtual polymorphism keyword is used for overriding.

Key Differences

  1. Inheritance in computer science is creating a new class from already existing functions whereas Polymorphism is a common interface for multiple forms.
  2. Inheritance is implemented in classes whereas Polymorphism is implemented on functions.
  3. Types of inheritance are single inheritance in which only one super class is made, multiple inheritances in which there are many super classes, hierarchical inheritance in which there is one super class and many subclasses and multiple inheritances which is derived from a derived class whereas Two types of polymorphism, overloading and overriding.
  4. Inheritance is used for reusability of code whereas Polymorphism is used for a function to decide.

Conclusion

In this article above we see the clear difference between inheritance and polymorphism with an example.

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Explanatory Video

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