<h3 id="nan" data-line="0" class="code-line">
<a class="header-anchor-link" href="#nan" aria-hidden="true"></a> NaN</h3>
<p data-line="1" class="code-line">日本語では「非数」と呼ぶ</p>
<h3 id="isnan()" data-line="3" class="code-line">
<a class="header-anchor-link" href="#isnan()" aria-hidden="true"></a> isNaN()</h3>
<p data-line="4" class="code-line">ある値が非数であるかどうかを判断する<br>
非数の場合、trueが返ってくる</p>
<h3 id="%E5%8F%82%E8%80%83" data-line="7" class="code-line">
<a class="header-anchor-link" href="#%E5%8F%82%E8%80%83" aria-hidden="true"></a> 参考</h3>
<p data-line="8" class="code-line"><span class="embed-block zenn-embedded zenn-embedded-card"><iframe id="zenn-embedded__00794f72ab377" src="https://embed.zenn.studio/card#zenn-embedded__00794f72ab377" data-content="https%3A%2F%2Fdeveloper.mozilla.org%2Fja%2Fdocs%2FGlossary%2FNaN" frameborder="0" scrolling="no" loading="lazy"></iframe></span><a href="https://developer.mozilla.org/ja/docs/Glossary/NaN" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://developer.mozilla.org/ja/docs/Glossary/NaN</a><br style="display:none">
<span class="embed-block zenn-embedded zenn-embedded-card"><iframe id="zenn-embedded__64e53792970b3" src="https://embed.zenn.studio/card#zenn-embedded__64e53792970b3" data-content="https%3A%2F%2Fdeveloper.mozilla.org%2Fja%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FisNaN" frameborder="0" scrolling="no" loading="lazy"></iframe></span><a href="https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/isNaN" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/isNaN</a></p>


NaN：非数　について

NaN

isNaN()

参考

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