http://test.largeq.cn/index.php?action=history&feed=atom&title=NaN 2026-04-21T01:21:33Z 本wiki的该页面的版本历史 MediaWiki 11.45.14 http://test.largeq.cn/index.php?title=NaN&diff=404&oldid=prev 2020-03-19T13:15:52Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hans-CN"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上一版本</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">2020年3月19日 (四) 13:15的版本</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >第1行：</td> <td colspan="2" class="diff-lineno">第1行：</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>众所周知，NaN，即Not a Number。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>众所周知，NaN，即Not a Number。</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==这个值不是javascript 特有的！==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==这个值不是javascript 特有的！==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>这个值其实是 IEEE754 <del class="diffchange diffchange-inline">浮点数标准明确定义的值。</del></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>这个值其实是 IEEE754 <ins class="diffchange diffchange-inline">浮点数标准明确定义的值。你在其它编程语言中也能看到它，比如JAVA。</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;syntaxhighlight lang=&quot;java&quot;&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;syntaxhighlight lang=&quot;java&quot;&gt;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>public class Nan{</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>public class Nan{</div></td></tr> </table>

IVEN http://test.largeq.cn/index.php?title=NaN&diff=403&oldid=prev 2020-03-19T12:59:26Z

<p>创建页面，内容为“众所周知，NaN，即Not a Number。 ==这个值不是javascript 特有的！== 这个值其实是 IEEE754 浮点数标准明确定义的值。 &lt;syntaxhighlight l…”</p> <p><b>新页面</b></p><div>众所周知，NaN，即Not a Number。<br /> ==这个值不是javascript 特有的！==<br /> 这个值其实是 IEEE754 浮点数标准明确定义的值。<br /> &lt;syntaxhighlight lang=&quot;java&quot;&gt;<br /> public class Nan{<br /> public static void main(String[] args) {<br /> //这里不会抛出异常，而是输出NaN<br /> System.out.println(0.0/0.0);<br /> }<br /> }<br /> &lt;/syntaxhighlight&gt;<br /> ==参考资料==<br /> [https://www.zhihu.com/question/379014728/answer/1087312773 为什么在 javascript 中 NaN 不能是一个独立的类型？ - justjavac的回答 - 知乎]</div>

IVEN