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doc: Update swift.md (#137) 7f3a01ab23

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jaywcjlove
2022-11-18 08:37:40 +00:00
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@ -166,7 +166,7 @@
</span><span class="code-line"><span class="token keyword">let</span> isMorning<span class="token punctuation">:</span> <span class="token class-name">Bool</span> <span class="token operator">=</span> <span class="token boolean">true</span>
</span></code></pre>
<p>常量是不可变的。它们的值不能改变：</p>
<pre class="language-swift"><code class="language-swift code-highlight"><span class="code-line">让 numberOfToys<span class="token punctuation">:</span> <span class="token class-name">Int</span> <span class="token operator">=</span> <span class="token number">8</span>
<pre class="language-swift"><code class="language-swift code-highlight"><span class="code-line"><span class="token keyword">let</span> numberOfToys<span class="token punctuation">:</span> <span class="token class-name">Int</span> <span class="token operator">=</span> <span class="token number">8</span>
</span><span class="code-line">numberOfToys <span class="token operator">+=</span> <span class="token number">1</span>
</span><span class="code-line"><span class="token comment">// ❌ 错误：numberOfToys 不可变</span>
</span></code></pre>