Quick Summary:

In this blog, you will understand the primary difference between Python vs JavaScript. Python is used for modern web development, while JavaScript is a traditional yet easy language. Meanwhile, both popular scripting languages have their advantages and disadvantages. Let’s find out which programming language meets your requirements.

Table of Contents


JavaScript and Python are prominent languages in automation, data science, web applications, and many more. Both are high-level languages designed to be easy to read and write.

So, why are these two programming languages so in the buzz? And despite being different, why should you compare them? While they have similarities, there are primary differences you should know.

We will disclose everything in this blog. The comprehensive comparison blog will cover Python vs JavaScript, their advantages and disadvantages, their real-life use cases, and the future outlook of both languages.

Why Compare Python vs JavaScript?

You might wonder why these two languages are being compared, as they have different structures (quite literally). Python is a dynamic, object-oriented programming language widely used for data science, automation, and web development.

Also, it is a general-purpose language that can solve any problem written in code. Python is easy to learn, read, and maintain. Additionally, it can integrate with C, Java, and C++ programming code.

JavaScript is a high-level scripting language primarily used for web development. JavaScript is a universal language because it supports front-end and back-end development.

Whenever you interact with websites or applications, you use JavaScript “behind the scenes.” It has numerous frameworks and libraries that help to develop robust software.

Simply put, both languages are mainly used for web development, mobile development, task automation, and web apps.

Henceforth, you can choose JavaScript or Python for development and Python with JavaScript (and vice versa). Both languages have beneficial features that create dynamic applications.

Why Compare Python vs JavaScript

So, let’s find out the essential differences between JavaScript vs Python.

Python Vs JavaScript: Difference Table

Python and JavaScript are object-oriented languages, yet there are differences. Let’s look at the key differences below:

Factors Python JavaScript
Applications Famous for data analysis Famous for creating web applications
Release date February 20, 1991 December 4, 1995
Objectives A general-purpose programming language with a focus on readability and simplicity A high-level programming language to create dynamic web apps
Designed by Guido van Rossum Brendan Eich
Inheritance Supports single and multiple inheritances Supports single inheritance
Implicit Conversation Strongly typed language means no support for implicit data conversation Weakly typed language; means supports implicit data conversation.
Syntax The small syntax is easy to learn and has higher readability Native syntax, which is complex and has lower readability
Learning Curve Python has a relatively general learning curve and is considered one of the easiest languages JavaScript has a steeper learning curve than Python
Encoding Format ASCII is the default source code Encoded as UTF-16 because of no support for manipulating raw bytes
REPL It comes with a built-in REPL and a browsing-based REPL No in-built REPL and relies on third-party tools for browsing
Hash Tables Support the use of hash tables through sets and dictionaries Do not offer any native support for the hashing function
Functional Agreements Raises an exception when a case of incorrect parameters is notified Defaults parameters as undefined; hence parameters are assigned
Modules and Libraries It has many built-in modules, underlying attributes, and includes 300,000 Python libraries It has a vast ecosystem of libraries and contains over 1.3 million packages
Data Types Built-in support for data types like tuples, lists, and dictionaries Data types like objects and arrays
Define Code Blocks Code blocks Python identified by the indentation of the statements Code blocks are enclosed within curly braces

Python Vs JavaScript: In-Depth Comparison

JavaScript and Python support different programming paradigms. How? Let’s understand it with an extensive comparison of JavaScript and Python:

? Mutability

Mutability is classified into mutable and immutable data types. In mutable objects, you can adjust the value even after assigning them. At the same time, immutable objects contrast that, as you can’t change them after being constructed.

In Python, everything is considered an object, thus supporting both mutability. But JavaScript has no mutability. The data in JavaScript are of a reference type or primitive type. Hence, JavaScript does not follow data that is neither an object nor a method.

Additionally, all primitive values in JavaScript are mutable. However, objects and arrays are immutable. Therefore, Python is preferable for mutability data types.

? Performance

Comparing Python vs JavaScript performance, JavaScript is a clear winner because it runs faster than Python in web development. JS is preferable for high-performance and real-time interactions.

However, Python is also an excellent choice for CPU-intensive tasks. In addition, It is an interpreted language, meaning that code is executed line by line, and it has a more extensive set of frameworks and libraries.

JavaScript is a compiled language, which means that code is compiled to machine-readable code before execution. Also, JS is quick because of the multi-threading feature of Node.js, which Python doesn’t.

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? Popularity

According to the JetBrains survey of The State of Developer Ecosystem 2023, 61% of developers use JavaScript, while 54% use Python. JS is the most commonly used programming language (11th in the row) and has a large, active community.

The difference between Python and JavaScript is that the Python programming language is growing significantly, beating other languages such as C, C++, and Swift. JavaScript’s popularity is primarily due to its widespread use in web development, which makes it the de facto language for client-side programming.

Also, according to the TIOBE Index for 2024, comparing Python vs JavaScript for web development, Python is the top programming language. Python’s popularity is mainly due to its versatility, ease of use, and extensive community of users and developers.

TIOBE 2024

? Scalability

JavaScript applications are highly scalable because of their multi-threading features; however, Python is less scalable because it uses Global Interpreter Lock and runs one thread at a time.

Additionally, using Node.js on JavaScript can increase the number of threads and scale the applications. Python’s GIL does not support concurrent programming, making using various processors with threads challenging.

Python is ideal for parallel computing, enabling more efficient use of resources and faster code execution. JavaScript is dynamic and handles large numbers of requests and concurrent users.


A REPL (Read-Eval-Print-Loop) allows developers to interact with code in real time by typing commands into a console and acquiring quick outcomes. JavaScript has access to REPL through the Node.js runtime environment.

The JavaScript REPL provides developers a convenient way to test and debug code. Python has a built-in REPL and allows developers to write and execute code in real-time with quick outcomes.

Python and JS have third-party REPLs and IDEs (Integrated Development Environments), providing additional dynamic functionality and features.

? Hash Tables

Hash tables are index structures that define a list of paired values. They help to search and detect operations faster than usual. Python has in-built hash tables called dictionaries and sets.

At the same time, JavaScript does not have built-in hash table support, but it can be used as a map and set. As a result, both JavaScript and Python can implement tables, but Python’s in-built support makes it easier to work with.

? Syntax

Both JavaScript and Python have different syntaxes to facilitate readability. JavaScript uses C-style syntax with semicolons and braces to delimit block coding and statements, while Python uses whitespace indentation to delimit code blocks.

Also, JavaScript has automatic semicolon insertion, sometimes leading to unexpected behaviour if incorrectly used. In contrast, Python’s strict type system helps catch errors early.

JavaScript’s syntax is more concise and expressive but also challenging to read and understand. Python’s syntax can make the code more readable and easier to follow, but it can also be more restrictive.

? Numeric types

Python has multiple numeric types, such as float, int, and complex. But JavaScript has only two types- Number and BigInt, also known as floating-type variables.

Numeric data types are stored in the database columns in the numbers forms and not in descriptive form. In addition, Python’s float data type represents floating-point numbers and can hold both integers and numbers with decimal points. In contrast, JavaScript’s number type can contain integer and floating-point numbers.

Hence, both have their benefits and help to avoid errors, optimize performance, and ensure the code works as intended.

Pros and Cons of Python and JavaScript

After understanding Python vs JavaScript, knowing its advantages and disadvantages is essential. Following are the pros and cons of Python and JavaScript.

Pros and Cons of Python

Pros of Python Cons of Python
Simple syntax and beginner-friendly Set-up work environment can be complex
Highly flexible and can build new features with dynamically-typed language Not suitable for mobile computing and does not have native support for mobile like Java
A vast set of libraries and contains code for multiple factors like web browsers and unit testing Consume too much memory usage and complex to manage an extensive database
Eliminate writing code manually and modules to find relevant tools The dependency management system is challenging
A cross-platform language that runs on numerous operating systems Lack of real-time features and slower speed
No compilation before running operations and make writing and testing code faster Slow compared to other non-compiled languages and consumes a lot of computational power

Pros and Cons of JavaScript

Pros of JavaScript Cons of JavaScript
Simple structure and feasible for beginners Support single and not multiple inheritances
It supports asynchronous programming and is suitable for creating modern web apps The Code is visible so that anyone can have your JavaScript code
Operates on client-side services and opens new possibilities for web development If any error arises, it can render the entire website
Easily integrates with other programming languages, like Python and Ruby on Rails Browsers offer limited tools for solving errors and debugging code
Allows to make rich user interfaces for interactive web pages Static typing makes significant application development challenging
Reduce code length with multiple built-in functions loops Interpreted differently by multiple browsers, which makes it complex to write and read cross-browser code

Use Cases of Python and JavaScript

According to the StackOverflow Developer Survey 2023, 63.61%% of developers prefer JavaScript, while 49.28%% choose Python as their preferred technical stack. Let’s look at the use cases of JavaScript and Python:

Python Practical Use Cases

Besides being the fastest coding language, Python is beneficial for several reasons. Let’s understand it with practical use cases of Pythons.

Data Science

Python is the most popular language for Data Science. Its libraries, such as SciPY, NumPy, and Pandas, help to extract insightful information. Also, Python is quite helpful for data scientists with research.

Machine Learning and Artificial Intelligence

Python is widely used for machine learning and artificial intelligence. Machine learning algorithms are essential for using Python and allow developers to write algorithms. Python has extensive libraries for AI and machine learning applications.

Gaming Development

Python is widely utilised for game web development. It provides a dynamic interface, fast responses, and efficient sound and graphics management. The Pygame library is one of the most used libraries for creating games in Python.

Finance Web Application

The functional programming language is used to build web apps for the financial industry. It is popular because of its flexibility, ease of use, and simplicity. Python’s libraries, such as Scikit-learn, NumPy, and Pandas, provide tools for data analysis.

Internet of Things

Real-life uses Python to develop applications with the Internet of Things. Python is used to build embedded software, allowing high-performance applications to work with other coding languages. Python allows developers to turn any object into electronic elements using Raspberry Pi.

Image Recognition and Text Processing

Python is utilized in multiple industries for text-processing applications and image recognition. Its Natural Language Toolkit (NLTK) is used to understand sentiment analysis and text processing. Some popular ones are Instagram and Google Photos.

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Python Applications in Industry

List of famous companies that adopted Python to create robust and efficient applications.

Python Applications in Industry


The social media platform uses Python for numerous tasks, such as data analysis and content delivery. Python’s fastest syntax and processing extract are insightful for data analytics. It also uses Django, a Python framework for developing and maintaining the web page.


The music streaming application uses Python for the data recommendations system and backend services. Spotify uses Django to create dynamic web pages and Flask, a Python micro-framework for building their backend services.


The cloud storage platform uses Python for automation, backend services, and data analysis. DropBox automates server deployment and manages tasks using Python libraries like Paramiko and Fabric.


The social discussion website uses Python’s backend services for multiple tasks like machine learning and data analysis. Reddit analyzes user data and generates information accordingly to enhance user experience.

JavaScript Practical Use Cases

As we know, JavaScript is a developer’s favorite. Let’s understand how it helps them with their practical use cases.

Web Development

JavaScript is mainly used for front-end web development. It enables developers to create efficient, interactive websites that respond to user input. It is also used to make animations and excellent, rich user interfaces.

Server-side Development

Using popular Node.js, JavaScript is used for server-side development. Nodejs is a famous server-side JavaScript runtime that allows developers to build dynamic web pages and applications.

Mobile App Development

JavaScript is highly used for developing mobile applications. Technologies like Java are used to create Android applications, and Swift for iOS applications.

Desktop App Development

A desktop application can work from a computer to a mobile device. Electron is a famous framework that uses HTML, CSS, and JavaScript to develop cross-platform applications.

Single-Page Applications

JavaScript is highly used to develop single-page applications. Angular, React, and Vue.js are the popular frameworks and libraries for building Single-page applications.

JavaScript Applications in Industry

Popular companies that are using and implementing JavaScript for dynamic web applications,

JavaScript Applications in Industry


Google web applications like Google Maps, Gmail, and Google Drive rely on JavaScript. It uses AngularJS to create web apps. Google also has its own JavaScript libraries and tools.


The social networking application is developed using JavaScript for a dynamic user interface. React, a JavaScript library allowing reusable UI components is used to update its platform.


Uber’s web application uses JavaScript for numerous functions, such as booking rides and managing accounts. Uber uses React to develop their UI components and Node.js for server-side development.


Airbnb uses JavaScript for its front end and relies on React to develop catchy user interface components. Also, it uses Node.js for the backend to build scalable web apps.

Can We Use Python with JavaScript?

Yes, we can use JavaScript with Python (and vice-versa). Python is a backend framework, and JavaScript is a front-end framework. We can integrate them to create robust and scalable software, websites, and mobile applications.

One way to implement this is to use Nodejs, a JavaScript runtime for server-side development. Another is to use a tool like PyExecJs, which enables JavaScript to execute within Python.

In addition, various frameworks like Django and Flask help developers use JavaScript with Python for web development. Also, multiple companies have already used Python with JavaScript and developed robust applications. Following is the list:

  • YouTube
  • Quora
  • Mozilla
  • Netflix
  • Yelp
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Future Outlook of Python and JavaScript in Emerging Technologies

Future Outlook of Python and JavaScript

If you think Python or JavaScript are restricted to particular web development features, you would be surprised to know how extensive they can go. Python vs JavaScript Speed are widely used languages and have become immensely popular for emerging technologies.

Python is known for data analysis and scientific computing, while JavaScript is more associated with web development. However, both languages are growing and becoming essential in machine learning, artificial intelligence, and the Internet of Things.

One of the significant trends in technology is Python with machine learning. Python has become the preferred language for ML programmers and upscaled data and computer science education as standard.

By integrating JavaScript with AI, developers can create a robust application that performs complex tasks, including language translation, image processing, and speech recognition.

Here are the real-life examples of JS and Python with advanced technologies:

  • Robotics: Python is used in robotics for programming autonomous robots and computer vision. JavaScript is used to control robots remotely and build a web interface for robot control.
  • AR/VR: Python is used to develop an open-source computer vision library to recognize and track objects, and JavaScript is used to build web-based interfaces.
  • Blockchain: Python is used to develop contracts and decentralized applications. Whereas JavaScript is used to run decentralized apps in browsers.

Also Read: Python vs R

When to Choose JavaScript and Python?

As you already know Python vs JavaScript, its pros and cons, and its future outlook, it is time to know when to choose Python or JavaScript.

When to Choose JavaScript?

  • Opt for JavaScript to develop web applications with interactive user interfaces and a large ecosystem of frameworks and libraries.
  • JavaScript is versatile and can create mobile, desktop, and web applications.
  • JavaScript is suitable for writing serverless functions. Platforms like Google Cloud Functions and AWS Lambda would be excellent for integrating with JavaScript.
  • JavaScript is a flexible, expressive, powerful language for robust applications.

When to Choose Python?

  • Determine Python to develop faster game applications with modern web development.
  • Python creates interactive chatbots and helps to monitor the stock market.
  • Python to use while writing programs to automate numerous repetitive tasks.
  • It is an excellent tool for working with image data, computer vision, and image recognition.


You may not get head-to-head differences between Python vs JavaScript. Still, it will help you decide which language performs particular tasks and which does not. Both popular programming languages are robust and have their uniqueness and limitations.

Ultimately, the choice of JavaScript vs Python web development depends on the project requirements and preferences. Choosing excellent skill sets and frameworks will help you to build innovative and scalable applications.

Frequently Asked Questions (FAQs)

Using Python directly in JavaScript is impossible, but you can integrate Python source code into a JavaScript project. One way is to use WebAssembly to run Python code in a Node Js environment or browser.

JavaScript is better to learn first as it is easy to use, dynamic, and understandable for beginners. However, choose Python when you want to use the core back-end development.

Python is one of the fastest programming languages in the world. It has a vast library, frameworks, data analysis, and efficient back-end development.

Python and JavaScript are easy to learn and are known for their simplicity and readability syntax.

Python or JavaScript

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