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<!doctype html>
<html>
<head>
<title>The Go Playground</title>
<link rel="stylesheet" href="/static/style.css">
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script src="/static/jquery-linedtextarea.js"></script>
<script src="/playground.js"></script>
<script src="/static/playground-embed.js"></script>
<script>
$(document).ready(function() {
playground({
'codeEl': '#code',
'outputEl': '#output',
'runEl': '#run, #embedRun',
'fmtEl': '#fmt',
'fmtImportEl': '#imports',
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'enableHistory': true,
'enableShortcuts': true,
'enableVet': true,
'toysEl': '.js-playgroundToysEl'
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playgroundEmbed({
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gtag('event', 'click', {
event_category: 'playground',
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</head>
<body itemscope itemtype="http://schema.org/CreativeWork">
<input type="button" value="Run" id="embedRun">
<div id="banner">
<div id="head" itemprop="name">The Go Playground</div>
<input type="button" value="Run" id="run">
<input type="button" value="Format" id="fmt">
<div id="importsBox">
<label title="Rewrite imports on Format">
<input type="checkbox" id="imports">
Imports
</label>
</div>
{{if $.Share}}
<input type="button" value="Share" id="share">
<input type="text" id="shareURL">
<label id="embedLabel">
<input type="checkbox" id="embed">
embed
</label>
{{end}}
<select class="js-playgroundToysEl">
<option value="hello.txt">Hello, playground</option>
<option value="test.txt">Tests</option>
<option value="multi.txt">Multiple files</option>
<option value="image.txt">Display image</option>
<option value="sleep.txt">Sleep</option>
<option value="clear.txt">Clear</option>
</select>
<input type="button" value="About" id="aboutButton">
</div>
<div id="wrap">
<textarea itemprop="description" id="code" name="code" autocorrect="off" autocomplete="off" autocapitalize="off" spellcheck="false">{{printf "%s" .Snippet.Body}}</textarea>
</div>
<div id="output"></div>
<img itemprop="image" src="/static/gopher.png" style="display:none">
<div id="about">
<p><b>About the Playground</b></p>
<p>
The Go Playground is a web service that runs on
<a href="https://golang.org/">golang.org</a>'s servers.
The service receives a Go program, <a href="https://golang.org/cmd/vet/">vets</a>, compiles, links, and
runs the program inside a sandbox, then returns the output.
</p>
<p>
If the program contains <a href="https://golang.org/pkg/testing">tests or examples</a>
and no main function, the service runs the tests.
Benchmarks will likely not be supported since the program runs in a sandboxed
environment with limited resources.
</p>
<p>
There are limitations to the programs that can be run in the playground:
</p>
<ul>
<li>
The playground can use most of the standard library, with some exceptions.
The only communication a playground program has to the outside world
is by writing to standard output and standard error.
</li>
<li>
In the playground the time begins at 2009-11-10 23:00:00 UTC
(determining the significance of this date is an exercise for the reader).
This makes it easier to cache programs by giving them deterministic output.
</li>
<li>
There are also limits on execution time and on CPU and memory usage.
</li>
</ul>
<p>
The article "<a href="https://blog.golang.org/playground" target="_blank" rel="noopener">Inside
the Go Playground</a>" describes how the playground is implemented.
The source code is available at <a href="https://go.googlesource.com/playground" target="_blank" rel="noopener">
https://go.googlesource.com/playground</a>.
</p>
<p>
The playground uses the latest stable release of Go.<br>
The current version is <a href="/p/Ztyu2FJaajl">{{.GoVersion}}</a>.
</p>
<p>
The playground service is used by more than just the official Go project
(<a href="https://gobyexample.com/">Go by Example</a> is one other instance)
and we are happy for you to use it on your own site.
All we ask is that you
<a href="mailto:golang-dev@googlegroups.com">contact us first (note this is a public mailing list)</a>,
use a unique user agent in your requests (so we can identify you),
and that your service is of benefit to the Go community.
</p>
<p>
Any requests for content removal should be directed to
<a href="mailto:security@golang.org">security@golang.org</a>.
Please include the URL and the reason for the request.
</p>
</div>
</body>
</html>