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chapter_computational_complexity/iteration_and_recursion/index.html
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<p>在 <code>while</code> 循环中，由于初始化和更新条件变量的步骤是独立在循环结构之外的，<strong>因此它比 <code>for</code> 循环的自由度更高</strong>。</p>
<p><strong><code>while</code> 循环比 <code>for</code> 循环的自由度更高</strong>。在 <code>while</code> 循环中，我们可以自由设计条件变量的初始化和更新步骤。</p>
<p>例如在以下代码中，条件变量 <span class="arithmatex">\(i\)</span> 每轮进行了两次更新，这种情况就不太方便用 <code>for</code> 循环实现。</p>
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