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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.

Python is an interpreted, general-purpose high-level programming language whose design philosophy emphasizes code readability. Use the python tag for all Python related questions. If you believe your …
Java (not to be confused with JavaScript) is a class-based, object-oriented, strongly typed, reflective language and run-time environment (JRE). Java programs are compiled to bytecode and run in a vir…
C# is a multi-paradigm, managed, garbage-collected, object-oriented programming language created by Microsoft in conjunction with the .NET platform. Use this tag for questions related to C#. In case a…
C++ is a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. This tag should be used for any question which requires knowledge or expertise with the C++ progra…
JavaScript is primarily a language focused on web development. Being a monopoly on the front end and having Node on the back end. Use this tag for questions regarding vanilla JavaScript; optionally ta…
Performance is a subset of Optimization: performance is the goal when you want the execution time of your program or routine to be optimal.
to your question to indicate that you are new to the language of your code. This will often be taken into consideration by reviewers when assessing your code.
Python 3 is the latest version of the Python programming language and was formally released on December 3rd, 2008. Use this tag along with the main python tag to denote programs that are meant to be r…
An algorithm is a sequence of well-defined steps that define an abstract solution to a problem. Use this tag when your issue is related to algorithm design.
PHP is a widely-used, general-purpose scripting language that is especially suited for web development.
4262 questions
C is a general-purpose computer programming language used for operating systems, games, and other high performance work and is clearly distinct from C++. It was developed in 1972 by Dennis Ritchie for…
Object-oriented programming is a programming paradigm using "objects": data structures consisting of data fields and methods together with their interactions.
3766 questions
when the code is a solution to a programming challenge. Always include a sufficient description of the problem to be solved - while a link to the challenge is welcome, the review request…
3282 questions
A string is a sequence of characters. It is commonly used to represent text or a sequence of bytes. Use this tag along with the appropriate programming language being used.
A JavaScript Library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development.
2345 questions
An array is an ordered data structure consisting of a collection of elements (values or variables), each identified by one (single dimensional array, or vector) or multiple indexes.
2122 questions
For questions requesting reviews of game development code.
1965 questions
HTML (Hyper Text Markup Language) is the standard content markup language of the web. It is an open standard developed and maintained by W3C (World Wide Web Consortium).
Code that is written to the 2011 version of the C++ standard, sometimes known by its pre-publication name of "C++0x". Use in conjunction with the 'c++' tag.
Ruby is a multi-platform, open-source, dynamic, object-oriented, interpreted language created by Yukihiro Matsumoto (Matz) in 1993.
1614 questions
when the program performs its work using multiple concurrent threads of execution.
1603 questions
Structured Query Language is a language for interacting with relational databases. Read the tag wiki's guidelines for requesting SQL reviews: 1) Provide context, 2) Include the schema, 3) If asking ab…
1460 questions
For questions requesting extra attention to be paid to the usage of design patterns in the code.
1423 questions
for code that parses its input, or that is source for a parser generator such as yacc or lex.
1345 questions
Visual Basic for Applications (VBA) is an event-driven programming language first introduced by Microsoft in 1993 to give Excel 5.0 a more robust object-oriented language for writing macros and automa…
1310 questions
.NET is a software framework supporting a multi-language paradigm and supporting language interoperability. .NET applications are executed in a virtual machine (CLR) which provides a few important ser…
1233 questions
Python 2 is the predecessor of Python 3 and its last version, Python 2.7 was formally released on July 3, 2010. Use this tag along with the main python tag to denote programs that are meant to be run …
1232 questions
when arranging items in order is the main focus of the code.
1159 questions
Recursion in computer science is a method of problem solving where the solution to a problem depends on solutions to smaller instances of the same problem.
1140 questions
Microsoft Excel is a commercial spreadsheet application written and distributed by Microsoft.
1105 questions
MySQL is an open-source, relational database management system. If your PHP code uses MySQLi, use the MySQLi tag instead.
1095 questions
Haskell is a purely functional programming language, featuring static typing, lazy evaluation, and monadic effects. The primary implementation is GHC, a high-performance compiler with a runtime suppor…
1080 questions
A linked list is a data structure in which the elements contain references to the next (and optionally the previous) element.
1064 questions
When the code scales so poorly in the face of large inputs that it cannot complete in a reasonable amount of time, use this instead of the [performance] tag.
1057 questions
DO NOT USE THIS TAG. It is in the process of being eliminated. If your question is just about performance, use the [performance] tag.
1054 questions
DateTime objects in many programming languages describe an instant in time, expressed as a date and time of day. Use on questions about reviewing code involving date/time logic.
1047 questions
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