Tags
A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
For questions about programming in ECMAScript (JavaScript/JS) and its different dialects/implementations (except for ActionScript). Note that JavaScript is NOT Java. Include all tags that are relevant…
2514027 questions
Python is a dynamically typed, multi-purpose programming language. It is designed to be quick to learn, understand, and use, and enforces a clean and uniform syntax. Please note that Python 2 is offic…
2166733 questions
Java is a high-level object-oriented programming language. Use this tag when you're having problems using or understanding the language itself. This tag is frequently used alongside other tags for lib…
1907982 questions
C# (pronounced "see sharp") is a high-level, statically typed, multi-paradigm programming language developed by Microsoft. C# code usually targets Microsoft's .NET family of tools and run-times, which…
1603436 questions
PHP is an open-source, multi-paradigm, dynamically-typed, and interpreted scripting language designed initially for server-side web development. Use this tag for questions about programming in the PHP…
1462624 questions
Android is Google's mobile operating system, used for programming or developing digital devices (Smartphones, Tablets, Automobiles, TVs, Wear, Glass, IoT). For topics related to Android, use Android-s…
1410839 questions
HTML (HyperText Markup Language) is the markup language for creating web pages and other information to be displayed in a web browser. Questions regarding HTML should include a minimal reproducible ex…
1181483 questions
jQuery is a JavaScript library.
jQuery is a popular cross-browser JavaScript library that facilitates Document Object Model (DOM) traversal, event handling, animations, and AJAX interactions by mi…
1034658 questions
C++ is a general-purpose programming language. Use this tag for questions about/utilizing C++. Do not also tag questions with [c] unless you have a good reason. C and C++ are different languages. Use …
800010 questions
CSS (Cascading Style Sheets) is a representation style sheet language used for describing the look and formatting of HTML (HyperText Markup Language), XML (Extensible Markup Language) documents and SV…
798827 questions
iOS is the mobile operating system running on the Apple iPhone, iPod touch, and iPad. Use this tag [ios] for questions related to programming on the iOS platform. Use the related tags [objective-c] an…
683749 questions
Structured Query Language (SQL) is a language for querying databases. Questions should include code examples, table structure, sample data, and a tag for the DBMS implementation (e.g. MySQL, PostgreSQ…
665923 questions
MySQL is a free, open-source Relational Database Management System (RDBMS) that uses Structured Query Language (SQL). DO NOT USE this tag for other DBs such as SQL Server, SQLite etc. Those are diff…
661568 questions
R is a free, open-source programming language & software environment for statistical computing, bioinformatics, visualization & general computing. Please use minimal reproducible examples others can …
497971 questions
Node.js is an event-based, non-blocking, asynchronous I/O runtime that uses Google's V8 JavaScript engine and libuv library. It is used for developing applications that make heavy use of the ability t…
467883 questions
React is a JavaScript library for building user interfaces. It uses a declarative, component-based paradigm and aims to be efficient and flexible.
467650 questions
An array is an ordered linear data structure consisting of a collection of elements (values, variables, or references), each identified by one or more indexes. When asking about specific variants of a…
415087 questions
C is a general-purpose programming language used for system programming (OS and embedded), libraries, games and cross-platform. This tag should be used with general questions concerning the C language…
399780 questions
ASP.NET is a Microsoft web application development framework that allows programmers to build dynamic web sites, web applications and web services. It is useful to use this tag in conjunction with the…
373920 questions
JSON (JavaScript Object Notation) is a serializable data interchange format that is a machine and human readable. Do not use this tag for native JavaScript objects or JavaScript object literals. Befor…
358431 questions
DO NOT USE UNLESS YOUR QUESTION IS FOR PYTHON 3 ONLY. Always use alongside the standard [python] tag.
341526 questions
Ruby on Rails is an open source full-stack web application framework written in Ruby. It follows the popular MVC framework model and is known for its "convention over configuration" approach to applic…
337442 questions
Do NOT use for questions about .NET Core - use [.net-core] instead. The .NET framework is a software framework designed mainly for the Microsoft Windows operating system. It includes an implementation…
334372 questions
Microsoft SQL Server is a relational database management system (RDBMS). Use this tag for all Microsoft SQL Server editions including Compact, Express, Azure, Fast-track, APS (formerly PDW) and Azure …
332326 questions
Swift is a general-purpose programming language developed by Apple Inc first released in 2014 for its platforms and Linux. Swift is open-source. Use the tag only for questions about language features …
330397 questions
Django is an open-source server-side web application framework written in Python. It is designed to reduce the effort required to create complex data-driven websites and web applications, with a speci…
309584 questions
Questions about Angular (not to be confused with AngularJS), the web framework from Google. Use this tag for Angular questions which are not specific to an individual version. For the older AngularJS …
300048 questions
should be used only on questions that are about Objective-C features or depend on code in the language. The tags [cocoa] and [cocoa-touch] should be used to ask about Apple's frameworks or cl…
292437 questions
Pandas is a Python library for data manipulation and analysis, e.g. dataframes, multidimensional time series and cross-sectional datasets commonly found in statistics, experimental science results, ec…
283527 questions
Only for questions on programming against Excel objects or files, or formula development. You may combine the Excel tag with VBA, VSTO, C#, VB.NET, PowerShell, OLE automation, and other programming re…
282547 questions
Use for questions about AngularJS (1.x), the open-source JavaScript framework. Do NOT use this tag for Angular 2 or later versions; instead, use the [angular] tag.
262747 questions
Regular expressions provide a declarative language to match patterns within strings. They are commonly used for string validation, parsing, and transformation. Specify the language (PHP, Python, etc) …
259271 questions
Ruby is a multi-platform open-source, dynamic object-oriented interpreted language. The [ruby] tag is for questions related to the Ruby language, including its syntax and its libraries. Ruby on Rails …
228502 questions
NOTICE: All Linux questions must be related to programming; those that aren't will be closed.
Use this tag only if your question relates to programming using Linux APIs or Linux-specific behavior, …
226366 questions
TypeScript is a typed superset of JavaScript that transpiles to plain JavaScript. It adds optional types, classes, interfaces, and modules to JavaScript. This tag is for questions specific to TypeScri…
222984 questions
AJAX (Asynchronous JavaScript and XML) is a technique for creating interactive website user interfaces without the traditional web page refresh or reload. It uses asynchronous data exchange between cl…
221954 questions