<!--{
	"Title": "Documentation",
	"Path": "/doc/",
	"Template": true
}-->

<p>
The Go programming language is an open source project to make programmers more
productive.
</p>

<p>
Go is expressive, concise, clean, and efficient. Its concurrency
mechanisms make it easy to write programs that get the most out of multicore
and networked machines, while its novel type system enables flexible and
modular program construction. Go compiles quickly to machine code yet has the
convenience of garbage collection and the power of run-time reflection. It's a
fast, statically typed, compiled language that feels like a dynamically typed,
interpreted language.
</p>

<div id="manual-nav"></div>

<h2 id="getting-started">Getting started</h2>

<h3 id="installing"><a href="/doc/install">Installing Go</a></h3>
<p>
Instructions for downloading and installing Go.
</p>

<h3 id="get-started-tutorial"><a href="/doc/tutorial/getting-started.html">Tutorial: Getting started</a></h3>
<p>
A brief Hello, World tutorial to get started. Learn a bit about Go code, tools, packages, and modules.
</p>

<h3 id="create-module-tutorial"><a href="/doc/tutorial/create-module.html">Tutorial: Create a module</a></h3>
<p>
A tutorial of short topics introducing functions, error handling, arrays, maps, unit testing, and compiling.
</p>

<h2 id="learning">Learning Go</h2>

<img class="gopher" src="/doc/gopher/doc.png" alt=""/>

<h3 id="go_tour">
	{{if $.GoogleCN}}
	  A Tour of Go
	{{else}}
	  <a href="//tour.golang.org/">A Tour of Go</a>
	{{end}}
</h3>
<p>
An interactive introduction to Go in three sections.
The first section covers basic syntax and data structures; the second discusses
methods and interfaces; and the third introduces Go's concurrency primitives.
Each section concludes with a few exercises so you can practice what you've
learned. You can {{if not $.GoogleCN}}<a href="//tour.golang.org/">take the tour
online</a> or{{end}} install it locally with:
</p>
<pre>
$ go get golang.org/x/tour
</pre>
<p>
This will place the <code>tour</code> binary in your workspace's <code>bin</code> directory.
</p>

<h3 id="code"><a href="code.html">How to write Go code</a></h3>
<p>
This doc explains how to develop a simple set of Go packages inside a module,
and it shows how to use the <a href="/cmd/go/"><code>go</code>&nbsp;command</a>
to build and test packages.
</p>

<h3 id="editors"><a href="editors.html">Editor plugins and IDEs</a></h3>
<p>
A document that summarizes commonly used editor plugins and IDEs with
Go support.
</p>

<h3 id="effective_go"><a href="effective_go.html">Effective Go</a></h3>
<p>
A document that gives tips for writing clear, idiomatic Go code.
A must read for any new Go programmer. It augments the tour and
the language specification, both of which should be read first.
</p>

<h3 id="diagnostics"><a href="/doc/diagnostics.html">Diagnostics</a></h3>
<p>
Summarizes tools and methodologies to diagnose problems in Go programs.
</p>

<h3 id="faq"><a href="/doc/faq">Frequently Asked Questions (FAQ)</a></h3>
<p>
Answers to common questions about Go.
</p>

<h3 id="tutorials"><a href="/doc/tutorial/">Tutorials</a></h3>
<p>
A list of tutorials to get started with Go.
</p>

<h3 id="wiki"><a href="/wiki">The Go Wiki</a></h3>
<p>A wiki maintained by the Go community.</p>

<h4 id="learn_more">More</h4>
<p>
See the <a href="/wiki/Learn">Learn</a> page at the <a href="/wiki">Wiki</a>
for more Go learning resources.
</p>


<h2 id="references">References</h2>

<h3 id="pkg"><a href="/pkg/">Package Documentation</a></h3>
<p>
The documentation for the Go standard library.
</p>

<h3 id="cmd"><a href="/doc/cmd">Command Documentation</a></h3>
<p>
The documentation for the Go tools.
</p>

<h3 id="spec"><a href="/ref/spec">Language Specification</a></h3>
<p>
The official Go Language specification.
</p>

<h3 id="go_mem"><a href="/ref/mem">The Go Memory Model</a></h3>
<p>
A document that specifies the conditions under which reads of a variable in
one goroutine can be guaranteed to observe values produced by writes to the
same variable in a different goroutine.
</p>

<h3 id="release"><a href="/doc/devel/release.html">Release History</a></h3>
<p>A summary of the changes between Go releases.</p>


<h2 id="articles">Articles</h2>

{{if not $.GoogleCN}}
<h3 id="blog"><a href="//blog.golang.org/">The Go Blog</a></h3>
<p>The official blog of the Go project, featuring news and in-depth articles by
the Go team and guests.</p>
{{end}}

<h4>Codewalks</h4>
<p>
Guided tours of Go programs.
</p>
<ul>
<li><a href="/doc/codewalk/functions">First-Class Functions in Go</a></li>
<li><a href="/doc/codewalk/markov">Generating arbitrary text: a Markov chain algorithm</a></li>
<li><a href="/doc/codewalk/sharemem">Share Memory by Communicating</a></li>
<li><a href="/doc/articles/wiki/">Writing Web Applications</a> - building a simple web application.</li>
</ul>

{{if not $.GoogleCN}}
<h4>Language</h4>
<ul>
<li><a href="/blog/json-rpc-tale-of-interfaces">JSON-RPC: a tale of interfaces</a></li>
<li><a href="/blog/gos-declaration-syntax">Go's Declaration Syntax</a></li>
<li><a href="/blog/defer-panic-and-recover">Defer, Panic, and Recover</a></li>
<li><a href="/blog/go-concurrency-patterns-timing-out-and">Go Concurrency Patterns: Timing out, moving on</a></li>
<li><a href="/blog/go-slices-usage-and-internals">Go Slices: usage and internals</a></li>
<li><a href="/blog/gif-decoder-exercise-in-go-interfaces">A GIF decoder: an exercise in Go interfaces</a></li>
<li><a href="/blog/error-handling-and-go">Error Handling and Go</a></li>
<li><a href="/blog/organizing-go-code">Organizing Go code</a></li>
</ul>

<h4>Packages</h4>
<ul>
<li><a href="/blog/json-and-go">JSON and Go</a> - using the <a href="/pkg/encoding/json/">json</a> package.</li>
<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>
<li><a href="/blog/laws-of-reflection">The Laws of Reflection</a> - the fundamentals of the <a href="/pkg/reflect/">reflect</a> package.</li>
<li><a href="/blog/go-image-package">The Go image package</a> - the fundamentals of the <a href="/pkg/image/">image</a> package.</li>
<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>
</ul>

<h4>Modules</h4>
<ul>
<li><a href="/blog/using-go-modules">Using Go Modules</a> - an introduction to using modules in a simple project.</li>
<li><a href="/blog/migrating-to-go-modules">Migrating to Go Modules</a> - converting an existing project to use modules.</li>
<li><a href="/blog/publishing-go-modules">Publishing Go Modules</a> - how to make new versions of modules available to others.</li>
<li><a href="/blog/v2-go-modules">Go Modules: v2 and Beyond</a> - creating and publishing major versions 2 and higher.</li>
<li><a href="/blog/module-compatibility">Keeping Your Modules Compatible</a> - how to keep your modules compatible with prior minor/patch versions.</li>
</ul>
{{end}}

<h4>Tools</h4>
<ul>
<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>
<li><a href="/doc/gdb">Debugging Go Code with GDB</a></li>
<li><a href="/doc/articles/race_detector.html">Data Race Detector</a> - a manual for the data race detector.</li>
<li><a href="/doc/asm">A Quick Guide to Go's Assembler</a> - an introduction to the assembler used by Go.</li>
{{if not $.GoogleCN}}
<li><a href="/blog/c-go-cgo">C? Go? Cgo!</a> - linking against C code with <a href="/cmd/cgo/">cgo</a>.</li>
<li><a href="/blog/godoc-documenting-go-code">Godoc: documenting Go code</a> - writing good documentation for <a href="/cmd/godoc/">godoc</a>.</li>
<li><a href="/blog/profiling-go-programs">Profiling Go Programs</a></li>
<li><a href="/blog/race-detector">Introducing the Go Race Detector</a> - an introduction to the race detector.</li>
{{end}}
</ul>

<h4 id="articles_more">More</h4>
<p>
See the <a href="/wiki/Articles">Articles page</a> at the
<a href="/wiki">Wiki</a> for more Go articles.
</p>

{{if not $.GoogleCN}}
<h2 id="talks">Talks</h2>

<img class="gopher" src="/doc/gopher/talks.png" alt=""/>

<h3 id="video_tour_of_go"><a href="https://research.swtch.com/gotour">A Video Tour of Go</a></h3>
<p>
Three things that make Go fast, fun, and productive:
interfaces, reflection, and concurrency. Builds a toy web crawler to
demonstrate these.
</p>

<h3 id="go_code_that_grows"><a href="//vimeo.com/53221560">Code that grows with grace</a></h3>
<p>
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.
</p>

<h3 id="go_concurrency_patterns"><a href="//www.youtube.com/watch?v=f6kdp27TYZs">Go Concurrency Patterns</a></h3>
<p>
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.
</p>

<h3 id="advanced_go_concurrency_patterns"><a href="//www.youtube.com/watch?v=QDDwwePbDtw">Advanced Go Concurrency Patterns</a></h3>
<p>
This talk expands on the <i>Go Concurrency Patterns</i> talk to dive deeper into Go's concurrency primitives.
</p>

<h4 id="talks_more">More</h4>
<p>
See the <a href="/talks">Go Talks site</a> and <a href="/wiki/GoTalks">wiki page</a> for more Go talks.
</p>
{{end}}

<h2 id="nonenglish">Non-English Documentation</h2>

<p>
See the <a href="/wiki/NonEnglish">NonEnglish</a> page
at the <a href="/wiki">Wiki</a> for localized
documentation.
</p>