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<h1 class='fqn'><span class='in-band'>Function <a href='../index.html'>core</a>::<wbr><a href='index.html'>char</a>::<wbr><a class="fn" href=''>from_u32</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.0.0'>1.0.0</span><span id='render-detail'>
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</span><a class='srclink' href='../../src/core/char.rs.html#128-130' title='goto source code'>[src]</a></span></h1>
<pre class='rust fn'>pub fn from_u32(i: u32) -> <a class="enum" href="../../core/option/enum.Option.html" title="enum core::option::Option">Option</a><char></pre><div class='docblock'><p>Converts a <code>u32</code> to a <code>char</code>.</p>
<p>Note that all <a href="../../std/primitive.char.html"><code>char</code></a>s are valid <a href="../../std/primitive.u32.html"><code>u32</code></a>s, and can be casted to one with
<a href="../../book/first-edition/casting-between-types.html#as"><code>as</code></a>:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">c</span> <span class="op">=</span> <span class="string">'💯'</span>;
<span class="kw">let</span> <span class="ident">i</span> <span class="op">=</span> <span class="ident">c</span> <span class="kw">as</span> <span class="ident">u32</span>;
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">128175</span>, <span class="ident">i</span>);<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=fn%20main()%20%7B%0Alet%20c%20%3D%20'%F0%9F%92%AF'%3B%0Alet%20i%20%3D%20c%20as%20u32%3B%0A%0Aassert_eq!(128175%2C%20i)%3B%0A%7D">Run</a></pre>
<p>However, the reverse is not true: not all valid <a href="../../std/primitive.u32.html"><code>u32</code></a>s are valid
<a href="../../std/primitive.char.html"><code>char</code></a>s. <code>from_u32()</code> will return <code>None</code> if the input is not a valid value
for a <a href="../../std/primitive.char.html"><code>char</code></a>.</p>
<p>For an unsafe version of this function which ignores these checks, see
<a href="fn.from_u32_unchecked.html"><code>from_u32_unchecked</code></a>.</p>
<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
<p>Basic usage:</p>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">char</span>;
<span class="kw">let</span> <span class="ident">c</span> <span class="op">=</span> <span class="ident">char</span>::<span class="ident">from_u32</span>(<span class="number">0x2764</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="string">'❤'</span>), <span class="ident">c</span>);<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=fn%20main()%20%7B%0Ause%20std%3A%3Achar%3B%0A%0Alet%20c%20%3D%20char%3A%3Afrom_u32(0x2764)%3B%0A%0Aassert_eq!(Some('%E2%9D%A4')%2C%20c)%3B%0A%7D">Run</a></pre>
<p>Returning <code>None</code> when the input is not a valid <a href="../../std/primitive.char.html"><code>char</code></a>:</p>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">char</span>;
<span class="kw">let</span> <span class="ident">c</span> <span class="op">=</span> <span class="ident">char</span>::<span class="ident">from_u32</span>(<span class="number">0x110000</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, <span class="ident">c</span>);<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=fn%20main()%20%7B%0Ause%20std%3A%3Achar%3B%0A%0Alet%20c%20%3D%20char%3A%3Afrom_u32(0x110000)%3B%0A%0Aassert_eq!(None%2C%20c)%3B%0A%7D">Run</a></pre>
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