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author | Florian Merz <me@fiji-flo.de> | 2021-02-11 13:12:08 +0100 |
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committer | Florian Merz <me@fiji-flo.de> | 2021-02-11 13:12:08 +0100 |
commit | 43a5cac2eff22c21071800e13bef12af9d3a37d0 (patch) | |
tree | f6e91f8aa958f15bd0b0aabf7b8dfc09063eceda /files/zh-tw/conflicting/web/javascript/guide/functions_b2cd05cbfe188215dc2e3f972d293ed6/index.html | |
parent | 8260a606c143e6b55a467edf017a56bdcd6cba7e (diff) | |
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diff --git a/files/zh-tw/conflicting/web/javascript/guide/functions_b2cd05cbfe188215dc2e3f972d293ed6/index.html b/files/zh-tw/conflicting/web/javascript/guide/functions_b2cd05cbfe188215dc2e3f972d293ed6/index.html new file mode 100644 index 0000000000..db213a465e --- /dev/null +++ b/files/zh-tw/conflicting/web/javascript/guide/functions_b2cd05cbfe188215dc2e3f972d293ed6/index.html @@ -0,0 +1,24 @@ +--- +title: isFinite 函數 +slug: >- + Web/JavaScript/Obsolete_Pages/Obsolete_Pages/Obsolete_Pages/預先定義的函數/isFinite_函數 +translation_of: Web/JavaScript/Guide/Functions +translation_of_original: Web/JavaScript/Guide/Obsolete_Pages/Predefined_Functions/isFinite_Function +--- +<p> </p> +<div class="onlyinclude"> +<h4 id="isFinite_函數">isFinite 函數</h4> +<p><code>isFinite</code> 函數會對參數求值,來判斷是否是有限的數字。<code>isFinite</code> 的語法如下︰</p> +<pre>isFinite(number) +</pre> +<p>此處的 number 就是要求值的數字。</p> +<p>如果參數是 <code>NaN</code>、正無限大、負無限大,這個方法就會返回 <code>false</code>,否則就會返回 <code>true</code>。</p> +<p>以下的代碼會檢查客戶端的輸入,來判斷是否是有限的數字。</p> +<pre>if(isFinite(ClientInput)) +{ + /* 適當的處理 */ +} +</pre> +</div> +<p>{{ PreviousNext("Core_JavaScript_1.5_教學:預先定義的函數:eval_函數", "Core_JavaScript_1.5_教學:預先定義的函數:isNaN_函數") }}</p> +<p>{{ languages( { "en": "en/Core_JavaScript_1.5_Guide/Predefined_Functions/isFinite_Function", "fr": "fr/Guide_JavaScript_1.5/Fonctions_pr\u00e9d\u00e9finies/La_fonction_isFinite", "ja": "ja/Core_JavaScript_1.5_Guide/Predefined_Functions/isFinite_Function", "pl": "pl/Przewodnik_po_j\u0119zyku_JavaScript_1.5/Funkcje_predefiniowane/Funkcja_isFinite" } ) }}</p> |