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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 `checked_pow` fn in crate `num_traits`."><meta name="keywords" content="rust, rustlang, rust-lang, checked_pow"><title>num_traits::pow::checked_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="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<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#230-262" 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="">checked_pow</a></span></h1><pre class="rust fn">pub fn checked_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="../../num_traits/ops/checked/trait.CheckedMul.html" title="trait num_traits::ops::checked::CheckedMul">CheckedMul</a>>(<br> base: T, <br> exp: usize<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><T></pre><div class="docblock"><p>Raises a value to the power of exp, returning <code>None</code> if an overflow occurred.</p>
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<p>Note that <code>0⁰</code> (<code>checked_pow(0, 0)</code>) returns <code>Some(1)</code>. Mathematically this is undefined.</p>
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<p>Otherwise same as the <code>pow</code> function.</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">checked_pow</span>;
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">checked_pow</span>(<span class="number">2i8</span>, <span class="number">4</span>), <span class="prelude-val">Some</span>(<span class="number">16</span>));
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">checked_pow</span>(<span class="number">7i8</span>, <span class="number">8</span>), <span class="prelude-val">None</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">checked_pow</span>(<span class="number">7u32</span>, <span class="number">8</span>), <span class="prelude-val">Some</span>(<span class="number">5_764_801</span>));
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">checked_pow</span>(<span class="number">0u32</span>, <span class="number">0</span>), <span class="prelude-val">Some</span>(<span class="number">1</span>)); <span class="comment">// Be aware if this case affect you</span></pre></div>
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