<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="generator" content="rustdoc">
<title>Functions</title>
<link rel="stylesheet" type="text/css" href="../rust.css">
<link rel="shortcut icon" href="https://www.rust-lang.org/favicon.ico">
</head>
<body class="rustdoc">
<!--[if lte IE 8]>
<div class="warning">
This old browser is unsupported and will most likely display funky
things.
</div>
<![endif]-->
<div id="versioninfo">
<img src="https://www.rust-lang.org/logos/rust-logo-32x32-blk.png" width="32" height="32" alt="Rust logo"><br>
<span class="white-sticker"><a href="https://www.rust-lang.org">Rust</a> 1.28.0</span><br>
<a href="https://github.com/rust-lang/rust/commit/"
class="hash white-sticker"></a>
</div>
<h1 class="title">Functions</h1>
<p><small>There is a new edition of the book and this is an old link.</small></p>
<blockquote>
<p>Function definitions in Rust start with <code>fn</code> and have a set of parentheses after the function name.
The curly brackets tell the compiler where the function body begins and ends.
We can call any function we’ve defined by entering its name followed by a set of parentheses.</p>
</blockquote>
<pre class="rust rust-example-rendered">
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="macro">println</span><span class="macro">!</span>(<span class="string">"Hello, world!"</span>);
<span class="ident">another_function</span>();
}
<span class="kw">fn</span> <span class="ident">another_function</span>() {
<span class="macro">println</span><span class="macro">!</span>(<span class="string">"Another function."</span>);
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Afn%20main()%20%7B%0A%20%20%20%20println!(%22Hello%2C%20world!%22)%3B%0A%0A%20%20%20%20another_function()%3B%0A%7D%0A%0Afn%20another_function()%20%7B%0A%20%20%20%20println!(%22Another%20function.%22)%3B%0A%7D">Run</a></pre>
<hr />
<p>Here are the relevant sections in the new and old books:</p>
<ul>
<li><strong><a href="first-edition/functions.html">In the first edition: Ch 3.2 — Functions</a></strong></li>
<li><small><a href="second-edition/ch03-03-how-functions-work.html">In the second edition: Ch 3.03 — Functions</a></small></li>
</ul>
<footer><p>
Copyright © 2011 The Rust Project Developers. Licensed under the
<a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>
or the <a href="https://opensource.org/licenses/MIT">MIT license</a>, at your option.
</p><p>
This file may not be copied, modified, or distributed except according to those terms.
</p></footer>
</body>
</html>
distrib
>
Mageia
>
6
>
armv7hl
>
media
>
core-updates
>
by-pkgid
>
4e2dbb669434a7691662cb2f0ad38972
>
files
>
711
