Difference Between Inheritance and Polymorphism (With Table)

These two seek to imitate real-world items and make it simpler for developers to write code that is encompassing the worldview in which they are generating code. There are four fundamental ideas in Object-oriented coding: inheritance, abstractions, polymorphism, and confinement. As previously said, each of the notions may be considered as the foundations upon which any contemporary language sits.

Inheritance vs Polymorphism

The main difference between inheritance and polymorphism is that Inheritance enables code reuse, whereas polymorphism seems to be the appearance of the same functionality in a modified way. The fundamental distinction is that inheritance enables previously written code to somehow be retained in a program whereas polymorphism offers a method for dynamically determining which version of a method to run. inheritance permits code upcycling and polymorphism facilitates function in several ways.

Inheritance is indeed a type of transmission under which a new category is generated that derives the characteristics of such an identifiable group. It promotes the notion of code reproducibility and shortens code complexity throughout object-oriented computing. Single transmission, multi-level inheritance, multiple lineage, hybrid hereditary, and patriarchal inheritance are the common manifestations of inheritance.

Polymorphism refers to the ability to complete a job in numerous forms or methods. It is used to describe functions or techniques. Polymorphism lets the entity choose the version of both the operation to perform both at compilation and run time. Polymorphism is classified into two types: compile-time variability as well as run-time polymorphism.

Comparison Table Between Inheritance and Polymorphism

Parameters of ComparisonInheritancePolymorphism
BasicFundamental Inheritance is the process of constructing a new category constructed using the specifications of an old classPolymorphism is beneficial as a bridge between different forms.
ImplementationInheritance is divided into different categories.On function/methods, heterogeneity is used.
UseTo promote the notion of modularization in OOP and shorten code.Allows an entity to choose which iteration of the operation to activate at compile and run time.
FormsSingle, multiple, multilevel inheritance, etc. are all possible.Genetic variations can be either compile as well as run-time.
ExampleBecause a ‘table’ is ‘hardwood,’ the category ‘table’ can possess the characteristic of the subclass ‘hardwood.’The function ‘set color’ in the category ‘desk’ can also be invoked at build and speed of operation.

What is Inheritance?

Inheritance has emerged as a major feature of OOP that supports scalability. Reusability might perhaps be characterized as the capability to construct a special class by recycling the characteristics of just an object database. In inheritance, there seems to be a structural unit that the abstract classes inherit. Whenever a class borrows another class, every foundation class’s attributes are becoming members of either the data structure.

The accessibility regular expression in this case specifies the method of reference to the component in the data structure for the derived class. Unless no access particular strategy is given, it is assumed to be private by choice. If the abstract methods are stringent, the control center is public by convention in C++. The subclass in Java borrows the other category while using the term extends.

A variant cannot visit properties of the base class that have been marked as private. A prototype might, like in Java, retrieve the superclass’s confidential attributes, and Java provides a solution if a descendent needs to obtain or initialize those parts. The term “super” can be used by the subcategory to refer to instances of its adjacent superclass. It can only reach constituents of the nearest superclass.

What is Polymorphism?

Polymorphism is generally defined as ‘one operation, numerous forms.’ It is accomplished at both the compile and event-driven levels. Overloading is used to accomplish compile-time flexibility, whereas overriding is used to accomplish run-time genetic variability. The polymorphism enables the artifact to choose “which version of the operation to execute when” at that as well compile but also run time.

Overloading invariance refers to calling a mechanism in a class several times with various data types as well as arguments, although the method to be saturated should have had the same call-back mechanism. Almost all of the period, the expanded algorithms are class generators. The concept of overriding is only applicable to operations of classifications that correspond with the concept of lineage. In C++, the technique to be overridden is usually tagged with the word “virtual” in the relational model and reproduced in the prototype.

Overloading necessitates writing the code or perhaps the class’s method many times with various parameters but the same instance variables. It implies that the parameters supplied into the operation might be varied, and the computed values supplied into the script at the run time determine which variant of the program is to be executed. On average, the most overloaded operation is the category function Object.

Main Differences Between Inheritance and Polymorphism

  1. Inheritance empowers a latent variable to utilize the base class types components and methods, the class diagram doesn’t get to specify those members or methods. Polymorphism, on the other hand, allows an object to choose which version of a procedure to execute at both build and run time.
  2. Inheritance is supported by the classes. Polymorphism, on the other end, is used on techniques and variables.
  3. Single, multiple, multilevel, hierarchical, and hybrid testamentary are the many types of inheritance. Polymorphism, on the other extreme, is characterized as overloading and overriding.
  4. Inheritance is the process of establishing a class that inherits its features from an established object. Polymorphism, on the other end, is functionality that may be implemented in a variety of ways.
  5. Mostly in the case of inheritance, the category bike might derive from the class representing two-wheel vehicles, which may be a subdivision of automobiles. In polymorphism, the category bike can contain a method called set color that changes the color of the bike depending on the name of both the color you’ve supplied.


Polymorphism and inheritance both seem to be important principles in making any program an actuality. They are indeed the foundations upon which the concept of object-oriented computing was built.

One thing to keep in mind while creating software is that if you want to rework the data you’ve previously written, essentially the specification of one category, and then do it again in your program to fulfill an identical or distinct function, you must utilize inheritance. If you wish to decrease general confusion throughout your code as well as utilize the very same context menu for related tasks, you should just use polymorphism.


  1. https://dl.acm.org/doi/abs/10.1145/1921607.1921611
  2. https://link.springer.com/chapter/10.1007/978-3-322-91603-7_23

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