Revision 577095 of continue

<h3 id=".E6.A6.82.E8.BF.B0">概述</h3>
<p>结束当前循环语句或标签的执行，然后继续执行循环中的下一次迭代。</p>
<h2 id="Version_Information">版本信息</h2>
<table class="standard-table">
  <tbody>
    <tr>
      <td class="header" colspan="2">声明</td>
    </tr>
    <tr>
      <td>Implemented in:</td>
      <td>JavaScript 1.0, NES 2.0</td>
    </tr>
    <tr>
      <td>ECMA Version:</td>
      <td>ECMA-262 (for the unlabeled version)
        <p>ECMA-262, Edition 3 (for the labeled version)</p>
      </td>
    </tr>
  </tbody>
</table>
<h3 id="Syntax" name="Syntax">语法</h3>
<p><code>continue {{ mediawiki.external('<i>label</i>') }}; </code></p>
<h3 id="Parameters" name="Parameters">参数</h3>
<dl>
  <dt>
    <code>label</code></dt>
  <dd>
    Identifier associated with the label of the statement.</dd>
</dl>
<h3 id="Description" name="Description">Description</h3>
<p>In contrast to the <code><a href="/en/JavaScript/Reference/Statements/break" title="en/JavaScript/Reference/Statements/break">break</a></code> statement, <code>continue</code> does not terminate the execution of the loop entirely: instead,</p>
<ul>
  <li>In a <code><a href="/en/JavaScript/Reference/Statements/while" title="en/JavaScript/Reference/Statements/while">while</a></code> loop, it jumps back to the condition.</li>
</ul>
<ul>
  <li>In a <code><a href="/en/JavaScript/Reference/Statements/for" title="en/JavaScript/Reference/Statements/for">for</a></code> loop, it jumps to the update expression.</li>
</ul>
<p>The <code>continue</code> statement can include an optional label that allows the program to jump to the next iteration of a labelled loop statement instead of the current loop. In this case, the <code>continue</code> statement needs to be nested within this labelled statement.</p>
<h3 id="Examples" name="Examples">Examples</h3>
<h4 id="Example:_Using_continue_with_while" name="Example:_Using_continue_with_while">Example: Using <code>continue</code> with <code>while</code></h4>
<p>The following example shows a <code><a href="/en/JavaScript/Reference/Statements/while" title="en/JavaScript/Reference/Statements/while">while</a></code> loop that has a <code>continue</code> statement that executes when the value of <code>i</code> is 3. Thus, <code>n</code> takes on the values 1, 3, 7, and 12.</p>
<pre class="brush: js">
i = 0;
n = 0;
while (i &lt; 5) {
   i++;
   if (i == 3)
      continue;
   n += i;
}
</pre>
<h4 id="Example:_Using_continue_with_a_label" name="Example:_Using_continue_with_a_label">Example: Using <code>continue</code> with a label</h4>
<p>In the following example, a statement labeled <code>checkiandj</code> contains a statement labeled <code>checkj</code>. If <code>continue</code> is encountered, the program continues at the top of the <code>checkj</code> statement. Each time <code>continue</code> is encountered, <code>checkj</code> reiterates until its condition returns false. When false is returned, the remainder of the <code>checkiandj</code> statement is completed.</p>
<p>If <code>continue</code> had a label of <code>checkiandj</code>, the program would continue at the top of the <code>checkiandj</code> statement.</p>
<pre class="brush: js">
checkiandj:
while (i &lt; 4) {
   document.write(i + "&lt;br&gt;");
   i += 1;

   checkj:
   while (j &gt; 4) {
      document.write(j + "&lt;br&gt;");
      j -= 1;
      if ((j&nbsp;% 2) == 0)
         continue checkj;
      document.write(j + " is odd.&lt;br&gt;");
   }
   document.write("i = " + i + "&lt;br&gt;");
   document.write("j = " + j + "&lt;br&gt;");
}
</pre>
<h3 id="See_also" name="See_also">See also</h3>
<p><a href="/en/JavaScript/Reference/Statements/break" title="en/JavaScript/Reference/Statements/break">break</a>, <a href="/en/JavaScript/Reference/Statements/label" title="en/JavaScript/Reference/Statements/label">label</a></p>
<p>&nbsp;</p>
<p>{{ languages( { "es": "es/Referencia_de_JavaScript_1.5/Sentencias/continue", "fr": "fr/R\u00e9f\u00e9rence_de_JavaScript_1.5_Core/Instructions/continue", "ja": "ja/Core_JavaScript_1.5_Reference/Statements/continue", "pl": "pl/Dokumentacja_j\u0119zyka_JavaScript_1.5/Polecenia/continue" } ) }}</p>