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<!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"><meta name="description" content="API documentation for the Rust `pow` fn in crate `num_traits`."><meta name="keywords" content="rust, rustlang, rust-lang, pow"><title>num_traits::pow::pow - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../num_traits/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class='location'><a href='../index.html'>num_traits</a>::<wbr><a href='index.html'>pow</a></p><script>window.sidebarCurrent = {name: 'pow', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../../src/num_traits/pow.rs.html#188-210' title='goto source code'>[src]</a></span><span class='in-band'>Function <a href='../index.html'>num_traits</a>::<wbr><a href='index.html'>pow</a>::<wbr><a class="fn" href=''>pow</a></span></h1><pre class='rust fn'>pub fn pow<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> + <a class="trait" href="../../num_traits/identities/trait.One.html" title="trait num_traits::identities::One">One</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Mul.html" title="trait core::ops::arith::Mul">Mul</a><T, Output = T>>(base: T, exp: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> T</pre><div class='docblock'><p>Raises a value to the power of exp, using exponentiation by squaring.</p>
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<p>Note that <code>0⁰</code> (<code>pow(0, 0)</code>) returnes <code>1</code>. Mathematically this is undefined.</p>
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<h1 id="example" class="section-header"><a href="#example">Example</a></h1>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">num_traits</span>::<span class="ident">pow</span>;
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">pow</span>(<span class="number">2i8</span>, <span class="number">4</span>), <span class="number">16</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">pow</span>(<span class="number">6u8</span>, <span class="number">3</span>), <span class="number">216</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">pow</span>(<span class="number">0u8</span>, <span class="number">0</span>), <span class="number">1</span>); <span class="comment">// Be aware if this case affects you</span></pre></div>
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