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<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="API documentation for the Rust `weak_rng` fn in crate `rand`."><metaname="keywords"content="rust, rustlang, rust-lang, weak_rng"><title>rand::weak_rng - Rust</title><linkrel="stylesheet"type="text/css"href="../normalize.css"><linkrel="stylesheet"type="text/css"href="../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../dark.css"><linkrel="stylesheet"type="text/css"href="../light.css"id="themeStyle"><scriptsrc="../storage.js"></script><noscript><linkrel="stylesheet"href="../noscript.css"></noscript><linkrel="shortcut icon"href="https://www.rust-lang.org/favicon.ico"><styletype="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><bodyclass="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="sidebar"><divclass="sidebar-menu">☰</div><ahref='../rand/index.html'><divclass='logo-container'><imgsrc='https://www.rust-lang.org/logos/rust-logo-128x128-blk.png'alt='logo'></div></a><divclass="sidebar-elems"><pclass='location'><ahref='index.html'>rand</a></p><script>window.sidebarCurrent={name:'weak_rng',ty:'fn',relpath:''};</script><scriptdefersrc="sidebar-items.js"></script></div></nav><divclass="theme-picker"><buttonid="theme-picker"aria-label="Pick another theme!"><imgsrc="../brush.svg"width="18"alt="Pick another theme!"></button><divid="theme-choices"></div></div><scriptsrc="../theme.js"></script><navclass="sub"><formclass="search-form js-only"><divclass="search-container"><div><selectid="crate-search"><optionvalue="All crates">All crates</option></select><inputclass="search-input"name="search"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"></div><aid="settings-menu"href="../settings.html"><imgsrc="../wheel.svg"width="18"alt="Change settings"></a></div></form></nav><sectionid="main"class="content"><h1class='fqn'><spanclass='out-of-band'><spanid='render-detail'><aid="toggle-all-docs"href="javascript:void(0)"title="collapse all docs">[<spanclass='inner'>−</span>]</a></span><aclass='srclink'href='../src/rand/lib.rs.html#842-844'title='goto source code'>[src]</a></span><spanclass='in-band'>Function <ahref='index.html'>rand</a>::<wbr><aclass="fn"href=''>weak_rng</a></span></h1><preclass='rust fn'>pub fn weak_rng() -><aclass="struct"href="../rand/struct.XorShiftRng.html"title="struct rand::XorShiftRng">XorShiftRng</a></pre><divclass='docblock'><p>Create a weak random number generator with a default algorithm and seed.</p>
<p>It returns the fastest <code>Rng</code> algorithm currently available in Rust without
consideration for cryptography or security. If you require a specifically
seeded <code>Rng</code> for consistency over time you should pick one algorithm and
create the <code>Rng</code> yourself.</p>
<p>This will seed the generator with randomness from thread_rng.</p>
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