ref: cb083ed612f90d648a7a5c27b8e155beef6c7bfb
dir: /js/godoc/golang.html/
<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8">
<meta name="description" content="Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="theme-color" content="#00ADD8">
<title>The Go Programming Language</title>
<link href="https://fonts.googleapis.com/css?family=Work+Sans:600|Roboto:400,700" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Product+Sans&text=Supported%20by%20Google&display=swap" rel="stylesheet">
<link type="text/css" rel="stylesheet" href="/lib/godoc/style.css">
<link rel="search" type="application/opensearchdescription+xml" title="godoc" href="/opensearch.xml" />
<script>window.initFuncs = [];</script>
<script>
var _gaq = _gaq || [];
_gaq.push(["_setAccount", "UA-11222381-2"]);
window.trackPageview = function() {
_gaq.push(["_trackPageview", location.pathname+location.hash]);
};
window.trackPageview();
window.trackEvent = function(category, action, opt_label, opt_value, opt_noninteraction) {
_gaq.push(["_trackEvent", category, action, opt_label, opt_value, opt_noninteraction]);
};
</script>
<script src="/lib/godoc/jquery.js" defer></script>
<script src="/lib/godoc/playground.js" defer></script>
<script>var goVersion = "go1.15.8";</script>
<script src="/lib/godoc/godocs.js" defer></script>
<body class="Site">
<header class="Header js-header">
<div class="Header-banner">
Black Lives Matter.
<a href="https://support.eji.org/give/153413/#!/donation/checkout"
target="_blank"
rel="noopener">Support the Equal Justice Initiative.</a>
</div>
<nav class="Header-nav ">
<a href="/"><img class="Header-logo" src="/lib/godoc/images/go-logo-blue.svg" alt="Go"></a>
<button class="Header-menuButton js-headerMenuButton" aria-label="Main menu" aria-expanded="false">
<div class="Header-menuButtonInner"></div>
</button>
<ul class="Header-menu">
<li class="Header-menuItem"><a href="/doc/">Documents</a></li>
<li class="Header-menuItem"><a href="/pkg/">Packages</a></li>
<li class="Header-menuItem"><a href="/project/">The Project</a></li>
<li class="Header-menuItem"><a href="/help/">Help</a></li>
<li class="Header-menuItem"><a href="/blog/">Blog</a></li>
<li class="Header-menuItem"><a href="https://play.golang.org/">Play</a></li>
<li class="Header-menuItem Header-menuItem--search">
<form class="HeaderSearch" role="search" action="/search">
<input class="HeaderSearch-input"
type="search"
name="q"
placeholder="Search"
aria-label="Search"
autocapitalize="off"
autocomplete="off"
autocorrect="off"
spellcheck="false"
required>
<button class="HeaderSearch-submit">
<!-- magnifying glass: --><svg class="HeaderSearch-icon" width="24" height="24" viewBox="0 0 24 24"><title>Search</title><path d="M15.5 14h-.79l-.28-.27C15.41 12.59 16 11.11 16 9.5 16 5.91 13.09 3 9.5 3S3 5.91 3 9.5 5.91 16 9.5 16c1.61 0 3.09-.59 4.23-1.57l.27.28v.79l5 4.99L20.49 19l-4.99-5zm-6 0C7.01 14 5 11.99 5 9.5S7.01 5 9.5 5 14 7.01 14 9.5 11.99 14 9.5 14z"/><path d="M0 0h24v24H0z" fill="none"/></svg>
</button>
</form>
</li>
</ul>
</nav>
</header>
<main id="page" class="Site-content">
<div class="container">
<div id="nav"></div>
<div class="HomeContainer">
<section class="HomeSection Hero">
<h1 class="Hero-header">
Go is an open source programming language that makes it easy to build
<strong>simple</strong>, <strong>reliable</strong>, and <strong>efficient</strong> software.
</h1>
<i class="Hero-gopher"></i>
<a href="/dl/" class="Button Button--big HeroDownloadButton">
<img class="HeroDownloadButton-image" src="/lib/godoc/images/cloud-download.svg" alt="">
Download Go
</a>
<p class="Hero-description">
Binary distributions available for<br>
Linux, macOS, Windows, and more.
</p>
</section>
<section class="HomeSection Playground">
<div class="Playground-headerContainer">
<h2 class="HomeSection-header">Try Go</h2>
<a class="Playground-popout js-playgroundShareEl">Open in Playground</a>
</div>
<div class="Playground-inputContainer">
<textarea class="Playground-input js-playgroundCodeEl" spellcheck="false" aria-label="Try Go">// You can edit this code!
// Click here and start typing.
package main
import "fmt"
func main() {
fmt.Println("Hello, 世界")
}
</textarea>
</div>
<div class="Playground-outputContainer js-playgroundOutputEl">
<pre class="Playground-output"><noscript>Hello, 世界</noscript></pre>
</div>
<div class="Playground-controls">
<select class="Playground-selectExample js-playgroundToysEl" aria-label="Code examples">
<option value="hello.go">Hello, World!</option>
<option value="life.go">Conway's Game of Life</option>
<option value="fib.go">Fibonacci Closure</option>
<option value="peano.go">Peano Integers</option>
<option value="pi.go">Concurrent pi</option>
<option value="sieve.go">Concurrent Prime Sieve</option>
<option value="solitaire.go">Peg Solitaire Solver</option>
<option value="tree.go">Tree Comparison</option>
</select>
<div class="Playground-buttons">
<button class="Button Button--primary js-playgroundRunEl" title="Run this code [shift-enter]">Run</button>
<div class="Playground-secondaryButtons">
<button class="Button js-playgroundShareEl" title="Share this code">Share</button>
<a class="Button tour" href="https://tour.golang.org/" title="Playground Go from your browser">Tour</a>
</div>
</div>
</div>
</section>
<section class="HomeSection Blog js-blogContainerEl">
<h2 class="HomeSection-header">Featured articles</h2>
<div class="Blog-footer js-blogFooterEl"><a class="Button Button--primary" href="https://blog.golang.org/">Read more ></a></div>
</section>
<section class="HomeSection">
<h2 class="HomeSection-header">Featured video</h2>
<div class="js-videoContainer" style="--aspect-ratio-padding: 58.07%;">
<iframe width="415" height="241" src="https://www.youtube.com/embed/rFejpH_tAHM" frameborder="0" allowfullscreen></iframe>
</div>
</section>
</div>
<script>
(function() {
'use strict';
window.initFuncs.push(function() {
// Set up playground if enabled.
if (window.playground) {
window.playground({
"codeEl": ".js-playgroundCodeEl",
"outputEl": ".js-playgroundOutputEl",
"runEl": ".js-playgroundRunEl",
"shareEl": ".js-playgroundShareEl",
"shareRedirect": "//play.golang.org/p/",
"toysEl": ".js-playgroundToysEl"
});
// The pre matched below is added by the code above. Style it appropriately.
document.querySelector(".js-playgroundOutputEl pre").classList.add("Playground-output");
} else {
$(".Playground").hide();
}
});
function readableTime(t) {
var m = ["January", "February", "March", "April", "May", "June", "July",
"August", "September", "October", "November", "December"];
var p = t.substring(0, t.indexOf("T")).split("-");
var d = new Date(p[0], p[1]-1, p[2]);
return d.getDate() + " " + m[d.getMonth()] + " " + d.getFullYear();
}
window.feedLoaded = function(result) {
var read = document.querySelector(".js-blogFooterEl");
for (var i = 0; i < result.length && i < 2; i++) {
var entry = result[i];
var header = document.createElement("h3");
header.className = "Blog-title";
var titleLink = document.createElement("a");
titleLink.href = entry.Link;
titleLink.rel = "noopener";
titleLink.textContent = entry.Title;
header.appendChild(titleLink);
read.parentNode.insertBefore(header, read);
var extract = document.createElement("div");
extract.className = "Blog-extract";
extract.innerHTML = entry.Summary;
// Ensure any cross-origin links have rel=noopener set.
var links = extract.querySelectorAll("a");
for (var j = 0; j < links.length; j++) {
links[j].rel = "noopener";
links[j].classList.add("Blog-link");
}
read.parentNode.insertBefore(extract, read);
var when = document.createElement("div");
when.className = "Blog-when";
when.textContent = "Published " + readableTime(entry.Time);
read.parentNode.insertBefore(when, read);
}
}
window.initFuncs.push(function() {
// Load blog feed.
$("<script/>")
.attr("src", "//blog.golang.org/.json?jsonp=feedLoaded")
.appendTo("body");
// Set the video at random.
var videos = [
{
s: "https://www.youtube.com/embed/rFejpH_tAHM",
title: "dotGo 2015 - Rob Pike - Simplicity is Complicated",
},
{
s: "https://www.youtube.com/embed/0ReKdcpNyQg",
title: "GopherCon 2015: Robert Griesemer - The Evolution of Go",
},
{
s: "https://www.youtube.com/embed/sX8r6zATHGU",
title: "Steve Francia - Go: building on the shoulders of giants and stepping on a few toes",
},
{
s: "https://www.youtube.com/embed/rWJHbh6qO_Y",
title: "Brad Fitzpatrick Go 1.11 and beyond",
},
{
s: "https://www.youtube.com/embed/bmZNaUcwBt4",
title: "The Why of Go",
},
{
s: "https://www.youtube.com/embed/0Zbh_vmAKvk",
title: "GopherCon 2017: Russ Cox - The Future of Go",
},
];
var v = videos[Math.floor(Math.random()*videos.length)];
$(".js-videoContainer iframe").attr("src", v.s).attr("title", v.title);
});
})();
</script>
</div><!-- .container -->
</main><!-- #page -->
<footer>
<div class="Footer ">
<img class="Footer-gopher" src="/lib/godoc/images/footer-gopher.jpg" alt="The Go Gopher">
<ul class="Footer-links">
<li class="Footer-link"><a href="/doc/copyright.html">Copyright</a></li>
<li class="Footer-link"><a href="/doc/tos.html">Terms of Service</a></li>
<li class="Footer-link"><a href="http://www.google.com/intl/en/policies/privacy/">Privacy Policy</a></li>
<li class="Footer-link"><a href="http://golang.org/issues/new?title=x/website:" target="_blank" rel="noopener">Report a website issue</a></li>
</ul>
<a class="Footer-supportedBy" href="https://google.com">Supported by Google</a>
</div>
</footer>
<script>
(function() {
var ga = document.createElement("script"); ga.type = "text/javascript"; ga.async = true;
ga.src = ("https:" == document.location.protocol ? "https://ssl" : "http://www") + ".google-analytics.com/ga.js";
var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(ga, s);
})();
</script>