List of the Top 25 Programming Languages for Codacy in 2025

At the core of extensible programming is the concept of defining functions. Python facilitates this with mandatory and optional parameters, keyword arguments, and the capability to handle arbitrary lists of arguments. Whether you're a novice in programming or possess years of expertise, Python remains approachable and easy to grasp. This language is notably inviting for newcomers while still providing considerable depth for those experienced in other programming languages. The following sections lay a strong groundwork for anyone eager to start their Python programming adventure! The dynamic community actively organizes various conferences and meetups to foster collaborative coding and the exchange of ideas. Furthermore, the comprehensive documentation acts as an invaluable guide, while mailing lists help maintain user connections. The Python Package Index (PyPI) offers a wide selection of third-party modules that enhance the Python experience. With an extensive standard library alongside community-contributed modules, Python presents endless programming possibilities, making it an adaptable choice for developers at every skill level. Additionally, the thriving ecosystem encourages continuous learning and innovation among its users.

The Java™ Programming Language is crafted to be a flexible, concurrent, and strongly typed language that is oriented around objects and follows a class-based framework. It is usually converted into bytecode that complies with the guidelines established in the Java Virtual Machine Specification. Developers typically write their source code in plain text documents, which are designated with a .java extension. These source files are then compiled into .class files using the javac compiler. Unlike code meant for native processors, a .class file contains bytecodes that represent the machine language recognized by the Java Virtual Machine (Java VM). To run an application, the java launcher tool initiates an instance of the Java Virtual Machine, enabling the smooth execution of the compiled bytecode. This entire workflow illustrates the remarkable efficiency and portability that Java provides across a wide range of computing platforms, showcasing its adaptability in diverse programming environments. As a result, developers can rely on Java to create applications that function consistently regardless of the underlying system architecture.

PowerShell is a dynamic framework for task automation and configuration management that functions across multiple platforms, featuring both a command-line interface and a scripting language. Unlike standard shells that mainly focus on text processing, PowerShell is built on the .NET Common Language Runtime (CLR), which enables it to manage .NET objects directly. This fundamental difference unlocks a variety of advanced tools and methodologies for automating processes. In contrast to traditional command-line interfaces, PowerShell cmdlets are designed to work with objects instead of just text strings. An object encapsulates structured information that goes beyond the simple characters displayed on a monitor. Each command's output is accompanied by valuable metadata that can be utilized as needed. If you've previously worked with text-processing tools, you might observe a distinct difference in functionality when using PowerShell, as it typically eliminates the need for separate text-processing applications to extract specific data. This means you can seamlessly interact with different elements of your data using the native PowerShell object syntax, which significantly enhances the overall user experience. Furthermore, this capability not only simplifies data manipulation but also empowers users to perform complex operations with ease.

Cascading Style Sheets, or CSS, act as a style sheet language that web developers utilize to arrange the layout of HTML and other elements on a website. Renowned for its widespread use, CSS is one of the most commonly employed languages throughout the Internet. For style sheets to perform optimally, it is essential that your markup is devoid of errors. To easily correct markup issues, employing a utility such as HTML Tidy can prove advantageous. This tool not only tidies up the markup but also improves its clarity and makes it easier to modify. I strongly recommend using Tidy regularly on any markup you handle, as it is particularly effective in refining content produced by authoring tools that may have inconsistent formatting practices. Each style property begins with the property name, followed by a colon, and concludes with the specific value assigned to that property. When you have multiple style properties, it is important to separate each with a semicolon to ensure clear differentiation. In summary, embracing best practices with tools like Tidy can greatly enhance web development efficiency and elevate the quality of your code. Additionally, adopting such practices will ultimately contribute to a more maintainable and scalable web project in the long run.

Kotlin is crafted for user-friendliness, enabling developers to create powerful applications from the outset. Its seamless compatibility with the Java ecosystem allows the utilization of favored JVM frameworks and libraries without difficulty. Developers can easily share their application logic across various platforms, including web, mobile, and desktop, while providing users with a native-like experience. This method not only conserves time but also grants unrestricted access to features specific to each platform. The Kotlin community is robust, with a swiftly growing international network of contributors enhancing the language's capabilities. An extensive range of community libraries supports developers, readily offering assistance through various community channels or direct queries to the Kotlin team. For those developing mobile applications for both iOS and Android, Kotlin Multiplatform Mobile functions as an SDK, effectively combining the benefits of cross-platform development with native app creation. By keeping a single codebase for critical elements such as networking, data storage, and analytics, developers can optimize the creation process for their Android and iOS applications. This streamlining of development not only boosts productivity but also cultivates an environment ripe for innovation in various projects, leading to more efficient workflows and enhanced application quality.

PHP is a versatile, flexible, and highly efficient programming language that caters to a variety of applications, from personal blogs to some of the most trafficked websites in the world. Recently, the PHP development team launched version 8.0.20, which is now accessible to all users. Additionally, while exploring the PHP.net website, you can easily obtain the information you need without searching through a box; instead, you can utilize straightforward PHP.net URLs that guide you directly to specific sections. This straightforward navigation enhances the overall user experience, enabling both developers and casual users to interact with PHP resources more effectively and efficiently. Consequently, the improvements in accessibility and usability reflect the ongoing commitment to enhancing the PHP ecosystem.

Visual Basic, which is an object-oriented programming language developed by Microsoft, facilitates the quick and easy creation of type-safe applications within the .NET framework. This version specifically focuses on improving the Visual Basic Runtime (microsoft.visualbasic.dll) for .NET Core, making it the first version designed exclusively for that environment. Upcoming revisions are expected to integrate aspects of the Visual Basic Runtime that depend on WinForms technology. The .NET framework itself serves as a dynamic and open-source development platform suitable for building various application types. Regardless of the specific application being developed, the code and project files retain a uniform structure and functionality. This consistency allows developers to utilize the same runtime, application programming interfaces (APIs), and language features throughout all of their projects. A Visual Basic application comprises standard components, with a solution hosting one or more projects; each project may include multiple assemblies, which are compiled from several source files. This organized approach not only helps streamline the development process but also empowers developers to efficiently handle the complexities of their applications. In essence, the framework’s cohesive design fosters a productive environment for developers to innovate and bring their ideas to fruition.

Participating in Swift programming is not only fun but also interactive, thanks to its concise and expressive syntax that incorporates modern features valued by developers. Built with an emphasis on safety, Swift allows the development of software that functions at impressive speeds. This programming language stands as a result of innovative research in language design, combined with rich experience in creating applications for Apple platforms. The clarity of its syntax supports the use of named parameters, which greatly improves the readability and maintainability of APIs in Swift. A significant advantage is the elimination of semi-colons, which results in a more fluid and streamlined coding process. Additionally, inferred types lead to a more organized codebase and minimize the chances of errors, while modules do away with the necessity for headers, creating well-structured namespaces. To accommodate a variety of international languages and even emojis, Swift strings are designed to be Unicode-compliant and employ UTF-8 encoding for enhanced performance in diverse applications. Furthermore, writing concurrent code is made easy with user-friendly built-in keywords that clarify asynchronous behavior, thereby improving both the clarity and reliability of the code. This rich array of features establishes Swift as an attractive option for developers looking to build efficient, reliable, and innovative applications that meet modern demands. Its growing community and extensive resources also contribute to making the learning curve easier for newcomers.

Are you intrigued by the widespread popularity of Ruby? Proponents of the language often refer to it as a masterpiece of design, blending artistry with practical applications. Since its public debut in 1995, Ruby has cultivated a dedicated community of developers from diverse backgrounds worldwide. By 2006, it had achieved notable recognition, with user groups forming in major cities and Ruby-centric conferences drawing significant attendance. During that time, the Ruby-Talk mailing list became particularly active, averaging around 200 messages each day. Nonetheless, in more recent years, the number of messages has dwindled as the community has splintered into various smaller factions. Ruby remains a mainstay in the top 10 rankings of programming languages, according to several indices that assess their growth and popularity, including the TIOBE index. A key driver of this enduring success is the increasing visibility of Ruby-based software, especially the influential Ruby on Rails web framework, which has been instrumental in attracting developers to the language. The unique combination of elegance, practicality, and a rich ecosystem of tools continues to draw fresh talent into the ever-evolving Ruby community. This ongoing evolution suggests that Ruby will maintain its relevance in the programming world for years to come.

TypeScript enhances JavaScript with improved syntax, creating a smoother integration with development environments, which helps in identifying errors early on within the editor. The TypeScript code is compiled into JavaScript, making it compatible with a wide range of platforms such as web browsers, Node.js, Deno, and mobile apps. Its understanding of JavaScript allows TypeScript to utilize type inference, providing robust tooling while reducing the need for extensive additional code. According to the 2020 State of JS survey, 78% of participants indicated they use TypeScript, and an impressive 93% of those surveyed plan to keep using it. The most common errors developers face are often type errors, where an unexpected type of value is encountered within a specific context. These mistakes can arise from simple errors such as typos, misinterpretations of a library’s API, incorrect assumptions about how code executes at runtime, or various other oversights. Consequently, adopting TypeScript can greatly improve both code quality and developer productivity by mitigating these frequent issues, ultimately leading to a more efficient coding experience. Additionally, its structured approach encourages best practices and fosters a more disciplined development environment.

Scala elegantly combines object-oriented and functional programming paradigms into a singular high-level language. Its static type system effectively reduces the risk of errors in complex applications, while compatibility with JVM and JavaScript empowers developers to build efficient systems that can tap into vast libraries. The Scala compiler excels at handling static types, which means that in most cases, you won’t have to declare variable types explicitly; the powerful type inference system takes care of it for you. Structural data types are represented through case classes, which automatically generate well-defined methods for toString, equals, and hashCode, in addition to enabling deconstruction through pattern matching techniques. Furthermore, functions in Scala are considered first-class citizens, allowing developers to create anonymous functions with a concise syntax. This combination of features not only enhances productivity but also makes Scala a highly attractive option for developers who wish to enjoy the strengths of both programming approaches. Ultimately, the blend of usability and functionality solidifies Scala's reputation as a modern and versatile programming language.

With a wide range of tools and APIs provided by top cloud service providers, creating services in Go has become more straightforward than ever. The language boasts a rich set of open-source libraries, alongside its robust standard library, making it an excellent choice for developing quick and advanced command-line interfaces. Go's impressive memory management and support for various integrated development environments further bolster its ability to power fast and scalable web applications. Additionally, its rapid compilation speed and clean syntax, coupled with built-in documentation and formatting features, are specifically designed to cater to the needs of DevOps experts and site reliability engineers. This discussion delves deeply into all aspects of Go. Whether you are starting a new project or aiming to enhance your existing Go expertise, a well-structured interactive introduction is available, divided into three distinct parts. Each segment includes practical exercises that reinforce your learning, while the Playground feature enables users to write and execute Go code directly within a browser, with immediate compilation and linking occurring on our servers. This interactive learning method not only makes mastering Go effective but also turns the process into an enjoyable experience. Furthermore, the community surrounding Go offers valuable resources and support, enriching your journey as you explore this powerful programming language.

Apache Groovy is a powerful and efficient programming language that features optional typing and dynamic capabilities, alongside support for static typing and compilation, specifically tailored for the Java platform to boost developer productivity through its concise, familiar, and user-friendly syntax. It integrates effortlessly with existing Java applications, offering an array of robust features such as scripting functionalities, the development of Domain-Specific Languages, and both runtime and compile-time meta-programming, all while incorporating functional programming elements. With an emphasis on clear, readable, and expressive syntax, Groovy stands out as particularly accessible for Java developers transitioning to a more dynamic environment. Its capabilities include closures, builders, and type inference, complemented by flexible syntax and advanced integration options that facilitate the embedding of straightforward business rules into applications. This versatile language is particularly adept at creating compact and maintainable tests, making it a superb choice for diverse build and automation tasks while providing extensive customization options. Additionally, Groovy's dynamic characteristics significantly enhance rapid development cycles, establishing it as a preferred choice among developers who seek both efficiency and innovation in their programming endeavors. Ultimately, Groovy not only streamlines coding processes but also fosters a creative atmosphere for developers aiming to push the boundaries of traditional programming.

Less, which stands for Leaner Style Sheets, acts as a complementary extension to CSS, broadening its functionality while ensuring it remains backward compatible. This document is the definitive resource for understanding both Less and Less.js, the JavaScript library that converts Less styles into conventional CSS. With a syntax that closely resembles CSS, newcomers can easily learn and adopt the language. Less adds a few practical features to CSS, making it accessible and quick for users to master. One prominent feature of Less is mixins, which enable the seamless integration of multiple properties from one rule-set into another. Furthermore, Less supports nesting, allowing developers to organize their styles in a hierarchical manner, either on its own or alongside traditional cascading styles. This versatility empowers developers to craft more structured and easily maintainable stylesheets without much hassle. Overall, Less not only enhances CSS but also encourages a more efficient workflow for style management.

Markdown offers a user-friendly way to create content in a clear and legible format, which can be seamlessly converted into standard XHTML or HTML. At its core, "Markdown" encompasses two main elements: (1) a plain text formatting syntax and (2) a Perl-based tool designed to transform this formatted text into HTML. For those interested in exploring Markdown's formatting options, the Syntax page provides comprehensive guidelines, while the online Dingus tool allows for immediate experimentation. The primary aim of Markdown's syntax is to maintain high readability, enabling users to present documents in plain text without visible tags or formatting indicators. While Markdown's syntax is influenced by various text-to-HTML converters, its foundational inspiration comes from the layout of plain text emails. This distinctive combination of simplicity and utility has propelled Markdown to become a favored choice for both writers and developers, facilitating their ability to craft formatted content with ease. Notably, its growing popularity is also reflected in the myriad of platforms and applications that now support Markdown, further expanding its accessibility and use.

Elixir is a dynamic and adaptable functional programming language crafted for the development of scalable and maintainable applications. This language operates on the Erlang VM, which is well-known for its ability to facilitate low-latency, distributed, and fault-tolerant systems. Elixir is applicable in a variety of domains, such as web development, embedded systems, data processing, and multimedia applications, which broadens its appeal across many sectors. If you're interested in getting started with Elixir, take the time to delve into our extensive guide and learning materials. The language employs lightweight execution threads called processes, designed for isolation and communication through message passing. Due to their lightweight nature, it's typical for a single machine to handle hundreds of thousands of these processes at once. The isolated design allows for independent garbage collection, significantly reducing system-wide pauses and enhancing resource efficiency for vertical scaling. Furthermore, these processes can communicate with others on different machines within the same network, further increasing the language's flexibility and reliability. Overall, Elixir's architecture not only supports the creation of highly concurrent applications but also offers developers a powerful tool for building resilient systems that can thrive in demanding environments. As developers continue to embrace Elixir, its community and ecosystem are expected to grow, leading to even more innovative uses and advancements in the technology.

C#, commonly known as "C Sharp," stands out as a modern programming language defined by its object-oriented and type-safe characteristics. It empowers developers to craft a diverse range of secure and efficient applications that function seamlessly within the .NET framework. Rooted in the C language family, those who are adept in C, C++, Java, and JavaScript are likely to find C# straightforward and approachable. This guide presents a detailed exploration of the fundamental aspects of C# up to version 8. As a language built on object-oriented and component-oriented principles, C# incorporates constructs designed to facilitate the creation and use of software components. Throughout its evolution, C# has integrated features that address emerging workloads and innovative software design strategies. At its core, C# embodies the principles of object orientation, allowing developers to define types and their related behaviors while nurturing a robust environment for application development. Furthermore, the language continuously evolves to remain pertinent in the dynamic realm of technology, adapting to meet the needs of modern developers. Ultimately, C# stands as a testament to the ongoing innovation in programming languages and their pivotal role in software engineering.

JSON, which stands for JavaScript Object Notation, provides a compact format that facilitates data exchange. Its straightforward nature enhances both human readability and machine parsing, making it an appealing choice for developers. Originating from the JavaScript Programming Language Standard ECMA-262 3rd Edition published in December 1999, JSON is a text-based format that maintains independence from any particular programming language while utilizing familiar syntax seen in C-family languages such as C, C++, C#, Java, JavaScript, Perl, and Python. This adaptability makes JSON a standout option for data interchange across various platforms. The JSON structure is based on two main elements: 1. Name/value pairs, which can be represented in various programming languages as objects, records, structs, dictionaries, hash tables, keyed lists, or associative arrays. 2. An ordered sequence of values, commonly represented in many programming languages as arrays, vectors, lists, or sequences. These essential components are widely recognized, and virtually every modern programming language includes support for them, thereby further solidifying JSON’s position as a highly practical data format for developers. Its enduring popularity is a testament to its effectiveness in facilitating seamless data communication across different systems.

Extensible Markup Language (XML) is a flexible and easy-to-understand text format that originated from SGML (ISO 8879). Originally developed to meet the needs of large-scale electronic publishing, XML has expanded to become essential for the exchange of various data types on the Web and in multiple other scenarios. This webpage provides insights into the ongoing initiatives at W3C within the XML Activity while also presenting a summary of its organizational framework. The efforts at W3C are compartmentalized into Working Groups, which are listed below along with links to their individual pages. If you are looking for formal technical specifications, they are available for access and download here, as they are publicly distributed. However, this is not the ideal location for finding tutorials, products, courses, books, or other resources related to XML. There are additional links provided below that may guide you to such educational materials. Furthermore, on each Working Group's page, you will find links to W3C Recommendations, Proposed Recommendations, Working Drafts, conformance test suites, and a variety of other documents, making it a thorough resource for anyone with an interest in XML. In addition, the structured nature of XML allows it to be easily adaptable for various applications beyond just Web data transmission.

Crystal's syntax is heavily influenced by Ruby, which makes it both easy to read and simple to write, especially advantageous for developers with prior Ruby experience who face a less steep learning curve. The language utilizes static type-checking to catch type-related errors early in the compilation process, effectively avoiding potential runtime problems. To keep the code clean and straightforward, Crystal includes built-in type inference, allowing programmers to often skip explicit type declarations. In this language, all types are inherently non-nilable, and variables are defined by a combination of their type and nil, enabling the compiler to check for null references before the code runs. Moreover, Crystal offers a powerful macro system tailored for metaprogramming, which provides a range of functionalities such as basic templating, AST inspection, type inspection, and the ability to run arbitrary external programs. This advanced macro system not only increases the flexibility of the language but also facilitates more dynamic code generation and manipulation, thereby enhancing the overall developer experience. Consequently, Crystal stands out as a modern programming language that balances simplicity with powerful features.

While JavaScript may appear somewhat unwieldy on the surface, it actually contains a refined and sophisticated essence. CoffeeScript aims to emphasize the positive elements of JavaScript in a more user-friendly way. Its core philosophy is simple: "It is just JavaScript." The CoffeeScript code compiles directly into equivalent JavaScript, which means there is no need for additional interpretation at the time of execution. You can easily leverage any JavaScript library while using CoffeeScript, and the opposite holds true as well. The resultant code is not only clean and well-structured but often achieves performance levels that are comparable to, or even exceed, those of hand-written JavaScript. Many of the modern features available in JavaScript are supported by CoffeeScript and can run natively on Node versions 7.6 and later, allowing for seamless execution of the compiled CoffeeScript code. This compilation method ensures both compatibility and simplicity for developers. However, this summary may not cover all aspects, particularly for Node versions that feature enhancements behind flags, so for detailed information, visiting node.green is recommended. Furthermore, testing your code directly in a web browser can provide insights into which features are accessible within that specific context, giving you a clearer understanding of its capabilities.

JavaScript functions as both a scripting and programming language that is widely utilized on the internet, enabling developers to build interactive and dynamic features for websites. An impressive 97% of all websites around the world rely on client-side JavaScript, highlighting its crucial role in web development. As one of the leading scripting languages available today, JavaScript has become indispensable for creating captivating online user experiences. Strings in JavaScript can be represented using either single quotes '' or double quotes "", and it is essential to be consistent with the chosen style throughout your code. For instance, if you initiate a string with a single quote, you must also terminate it with a single quote. Each type of quotation mark comes with its own set of benefits and drawbacks; for example, using single quotes can make it easier to incorporate HTML within your JavaScript code, as it removes the need to escape double quotes. This is particularly important when you need to include quotation marks within a string, which often necessitates using opposite styles for clarity and correctness. Furthermore, mastering the management of strings in JavaScript is crucial for developers aiming to elevate their programming abilities and create more sophisticated applications. In conclusion, a solid grasp of string handling will not only improve your coding efficiency but also enhance the overall quality of your web projects.

SQL is a distinct programming language crafted specifically for the retrieval, organization, and alteration of data in relational databases and the associated management systems. Utilizing SQL is crucial for efficient database management and seamless interaction with data, making it an indispensable tool for developers and data analysts alike.

Objective-C is the main programming language used to create applications for both OS X and iOS environments. This language builds on C by incorporating strong object-oriented programming features and a dynamic runtime system. It maintains the fundamental syntax, data types, and control structures of C while adding new syntax for defining classes and methods. Additionally, Objective-C enriches its functionality with built-in capabilities for managing object graphs and using object literals, which facilitates dynamic typing and binding that postpones many operations until the program runs. In the process of developing applications for OS X or iOS, developers primarily work with objects that are instances of Objective-C classes, some of which are supplied by frameworks such as Cocoa or Cocoa Touch, while others are crafted by the developers themselves. By gaining expertise in Objective-C, developers can greatly enhance their skills in building complex and efficient applications tailored for Apple's ecosystem. Ultimately, this mastery not only enables the creation of innovative software but also opens the door to deeper understanding of the underlying principles of programming on these platforms.

C++ is celebrated for its clear and concise syntax. Although beginners may initially perceive C++ as more complex than other programming languages due to its extensive use of symbols such as {}[]*&!|..., mastering these symbols can actually bring about a greater level of clarity and organization, surpassing languages that rely heavily on lengthy English phrases. Furthermore, C++ has improved its input/output system in comparison to C, and the integration of the standard template library makes data management and interaction more efficient, ensuring it remains as approachable as other languages without losing any essential functionality. This programming language adopts an object-oriented paradigm, treating software elements as individual objects with unique attributes and behaviors, which enhances or even replaces the conventional structured programming model that focused primarily on routines and parameters. By prioritizing objects, C++ provides developers with increased flexibility and scalability in their projects. Thus, the advantages of C++ position it as a robust choice for modern software development.