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<!--{
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"Title": "Documentation",
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"Path": "/doc/"
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}-->
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<p>
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The Go programming language is an open source project to make programmers more
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productive.
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</p>
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<p>
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Go is expressive, concise, clean, and efficient. Its concurrency
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mechanisms make it easy to write programs that get the most out of multicore
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and networked machines, while its novel type system enables flexible and
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modular program construction. Go compiles quickly to machine code yet has the
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convenience of garbage collection and the power of run-time reflection. It's a
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fast, statically typed, compiled language that feels like a dynamically typed,
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interpreted language.
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</p>
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<div id="manual-nav"></div>
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<h2>Installing Go</h2>
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<h3><a href="/doc/install">Getting Started</a></h3>
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<p>
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Instructions for downloading and installing the Go compilers, tools, and
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libraries.
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</p>
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<h2 id="learning">Learning Go</h2>
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<img class="gopher" src="/doc/gopher/doc.png"/>
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<h3 id="go_tour"><a href="//tour.golang.org/">A Tour of Go</a></h3>
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<p>
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An interactive introduction to Go in three sections.
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The first section covers basic syntax and data structures; the second discusses
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methods and interfaces; and the third introduces Go's concurrency primitives.
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Each section concludes with a few exercises so you can practice what you've
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learned. You can <a href="//tour.golang.org/">take the tour online</a> or
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<a href="//code.google.com/p/go-tour/">install it locally</a>.
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</p>
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<h3 id="code"><a href="code.html">How to write Go code</a></h3>
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<p>
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Also available as a
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<a href="//www.youtube.com/watch?v=XCsL89YtqCs">screencast</a>, this doc
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explains how to use the <a href="/cmd/go/">go command</a> to fetch, build, and
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install packages, commands, and run tests.
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</p>
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<h3 id="effective_go"><a href="effective_go.html">Effective Go</a></h3>
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<p>
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A document that gives tips for writing clear, idiomatic Go code.
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A must read for any new Go programmer. It augments the tour and
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the language specification, both of which should be read first.
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</p>
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<h3 id="faq"><a href="/doc/faq">Frequently Asked Questions (FAQ)</a></h3>
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<p>
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Answers to common questions about Go.
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</p>
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<h3 id="wiki"><a href="/wiki">The Go Wiki</a></h3>
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<p>A wiki maintained by the Go community.</p>
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<h4 id="learn_more">More</h4>
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<p>
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See the <a href="/wiki/Learn">Learn</a> page at the <a href="/wiki">Wiki</a>
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for more Go learning resources.
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</p>
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<h2 id="references">References</h2>
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<h3 id="pkg"><a href="/pkg/">Package Documentation</a></h3>
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<p>
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The documentation for the Go standard library.
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</p>
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<h3 id="cmd"><a href="/doc/cmd">Command Documentation</a></h3>
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<p>
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The documentation for the Go tools.
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</p>
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<h3 id="spec"><a href="/ref/spec">Language Specification</a></h3>
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<p>
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The official Go Language specification.
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</p>
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<h3 id="go_mem"><a href="/ref/mem">The Go Memory Model</a></h3>
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<p>
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A document that specifies the conditions under which reads of a variable in
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one goroutine can be guaranteed to observe values produced by writes to the
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same variable in a different goroutine.
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</p>
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<h3 id="release"><a href="/doc/devel/release.html">Release History</a></h3>
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<p>A summary of the changes between Go releases.</p>
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<h2 id="articles">Articles</h2>
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<h3 id="blog"><a href="//blog.golang.org/">The Go Blog</a></h3>
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<p>The official blog of the Go project, featuring news and in-depth articles by
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the Go team and guests.</p>
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<h4>Codewalks</h4>
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<p>
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Guided tours of Go programs.
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</p>
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<ul>
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<li><a href="/doc/codewalk/functions">First-Class Functions in Go</a></li>
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<li><a href="/doc/codewalk/markov">Generating arbitrary text: a Markov chain algorithm</a></li>
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<li><a href="/doc/codewalk/sharemem">Share Memory by Communicating</a></li>
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<li><a href="/doc/articles/wiki/">Writing Web Applications</a> - building a simple web application.</li>
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</ul>
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<h4>Language</h4>
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<ul>
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<li><a href="/blog/json-rpc-tale-of-interfaces">JSON-RPC: a tale of interfaces</a></li>
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<li><a href="/blog/gos-declaration-syntax">Go's Declaration Syntax</a></li>
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<li><a href="/blog/defer-panic-and-recover">Defer, Panic, and Recover</a></li>
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<li><a href="/blog/go-concurrency-patterns-timing-out-and">Go Concurrency Patterns: Timing out, moving on</a></li>
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<li><a href="/blog/go-slices-usage-and-internals">Go Slices: usage and internals</a></li>
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<li><a href="/blog/gif-decoder-exercise-in-go-interfaces">A GIF decoder: an exercise in Go interfaces</a></li>
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<li><a href="/blog/error-handling-and-go">Error Handling and Go</a></li>
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<li><a href="/blog/organizing-go-code">Organizing Go code</a></li>
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</ul>
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<h4>Packages</h4>
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<ul>
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<li><a href="/blog/json-and-go">JSON and Go</a> - using the <a href="/pkg/encoding/json/">json</a> package.</li>
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<li><a href="/blog/gobs-of-data">Gobs of data</a> - the design and use of the <a href="/pkg/encoding/gob/">gob</a> package.</li>
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<li><a href="/blog/laws-of-reflection">The Laws of Reflection</a> - the fundamentals of the <a href="/pkg/reflect/">reflect</a> package.</li>
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<li><a href="/blog/go-image-package">The Go image package</a> - the fundamentals of the <a href="/pkg/image/">image</a> package.</li>
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<li><a href="/blog/go-imagedraw-package">The Go image/draw package</a> - the fundamentals of the <a href="/pkg/image/draw/">image/draw</a> package.</li>
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</ul>
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<h4>Tools</h4>
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<ul>
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<li><a href="/doc/articles/go_command.html">About the Go command</a> - why we wrote it, what it is, what it's not, and how to use it.</li>
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<li><a href="/blog/c-go-cgo">C? Go? Cgo!</a> - linking against C code with <a href="/cmd/cgo/">cgo</a>.</li>
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<li><a href="/doc/gdb">Debugging Go Code with GDB</a></li>
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<li><a href="/blog/godoc-documenting-go-code">Godoc: documenting Go code</a> - writing good documentation for <a href="/cmd/godoc/">godoc</a>.</li>
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<li><a href="/blog/profiling-go-programs">Profiling Go Programs</a></li>
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<li><a href="/doc/articles/race_detector.html">Data Race Detector</a> - a manual for the data race detector.</li>
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<li><a href="/blog/race-detector">Introducing the Go Race Detector</a> - an introduction to the race detector.</li>
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<li><a href="/doc/asm">A Quick Guide to Go's Assembler</a> - an introduction to the assembler used by Go.</li>
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</ul>
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<h4 id="articles_more">More</h4>
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<p>
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See the <a href="/wiki/Articles">Articles page</a> at the
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<a href="/wiki">Wiki</a> for more Go articles.
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</p>
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<h2 id="talks">Talks</h2>
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<img class="gopher" src="/doc/gopher/talks.png"/>
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<h3 id="video_tour_of_go"><a href="http://research.swtch.com/gotour">A Video Tour of Go</a></h3>
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<p>
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Three things that make Go fast, fun, and productive:
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interfaces, reflection, and concurrency. Builds a toy web crawler to
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demonstrate these.
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</p>
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<h3 id="go_code_that_grows"><a href="//vimeo.com/53221560">Code that grows with grace</a></h3>
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<p>
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One of Go's key design goals is code adaptability; that it should be easy to take a simple design and build upon it in a clean and natural way. In this talk Andrew Gerrand describes a simple "chat roulette" server that matches pairs of incoming TCP connections, and then use Go's concurrency mechanisms, interfaces, and standard library to extend it with a web interface and other features. While the function of the program changes dramatically, Go's flexibility preserves the original design as it grows.
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</p>
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<h3 id="go_concurrency_patterns"><a href="//www.youtube.com/watch?v=f6kdp27TYZs">Go Concurrency Patterns</a></h3>
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<p>
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Concurrency is the key to designing high performance network services. Go's concurrency primitives (goroutines and channels) provide a simple and efficient means of expressing concurrent execution. In this talk we see how tricky concurrency problems can be solved gracefully with simple Go code.
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</p>
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<h3 id="advanced_go_concurrency_patterns"><a href="//www.youtube.com/watch?v=QDDwwePbDtw">Advanced Go Concurrency Patterns</a></h3>
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<p>
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This talk expands on the <i>Go Concurrency Patterns</i> talk to dive deeper into Go's concurrency primitives.
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</p>
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<h4 id="talks_more">More</h4>
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<p>
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See the <a href="/talks">Go Talks site</a> and <a href="/wiki/GoTalks">wiki page</a> for more Go talks.
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</p>
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<h2 id="nonenglish">Non-English Documentation</h2>
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<p>
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See the <a href="/wiki/NonEnglish">NonEnglish</a> page
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at the <a href="/wiki">Wiki</a> for localized
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documentation.
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</p>
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