aboutsummaryrefslogtreecommitdiff
path: root/files/zh-tw/web/javascript/reference/global_objects/infinity/index.html
diff options
context:
space:
mode:
Diffstat (limited to 'files/zh-tw/web/javascript/reference/global_objects/infinity/index.html')
-rw-r--r--files/zh-tw/web/javascript/reference/global_objects/infinity/index.html76
1 files changed, 76 insertions, 0 deletions
diff --git a/files/zh-tw/web/javascript/reference/global_objects/infinity/index.html b/files/zh-tw/web/javascript/reference/global_objects/infinity/index.html
new file mode 100644
index 0000000000..147914eea7
--- /dev/null
+++ b/files/zh-tw/web/javascript/reference/global_objects/infinity/index.html
@@ -0,0 +1,76 @@
+---
+title: Infinity
+slug: Web/JavaScript/Reference/Global_Objects/Infinity
+translation_of: Web/JavaScript/Reference/Global_Objects/Infinity
+---
+<div>{{jsSidebar("Objects")}}</div>
+
+<p>全域 <code><strong>Infinity</strong></code> 屬性是一個表示無窮大的數值。</p>
+
+<p>{{js_property_attributes(0,0,0)}}</p>
+
+<h2 id="語法">語法</h2>
+
+<pre class="syntaxbox"><code>Infinity </code></pre>
+
+<h2 id="描述">描述</h2>
+
+<p><code>Infinity</code> 是全域物件屬性,即它是全域範圍內的變數。</p>
+
+<p><code>Infinity</code> 的初始值是 {{jsxref("Number.POSITIVE_INFINITY")}} <code>Infinity</code> 值(正無窮大)值大於其他任何數值。該值在數學上表現為無窮大。例如,任何乘以 <code>Infinity</code> 的正整數都是 <code>Infinity</code>,除以 <code>Infinity</code> 的任何數都是 0。</p>
+
+<p>按照 ECMAScript 5 規範,在 JavaScript 1.8.5 / Firefox 4 實作的 <code>Infinity</code> 乃唯讀屬性。</p>
+
+<h2 id="範例">範例</h2>
+
+<pre class="brush: js">console.log(Infinity ); /* Infinity */
+console.log(Infinity + 1 ); /* Infinity */
+console.log(Math.pow(10,1000)); /* Infinity */
+console.log(Math.log(0) ); /* -Infinity */
+console.log(1 / Infinity ); /* 0 */
+</pre>
+
+<h2 id="規範">規範</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">規範</th>
+ <th scope="col">狀態</th>
+ <th scope="col">註解</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES1')}}</td>
+ <td>{{Spec2('ES1')}}</td>
+ <td>初始定義。在 JavaScript 1.3 實作。</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES5.1', '#sec-15.1.1.2', 'Infinity')}}</td>
+ <td>{{Spec2('ES5.1')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES6', '#sec-value-properties-of-the-global-object-infinity', 'Infinity')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-value-properties-of-the-global-object-infinity', 'Infinity')}}</td>
+ <td>{{Spec2('ESDraft')}}</td>
+ <td> </td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="瀏覽器相容性">瀏覽器相容性</h2>
+
+<p>{{Compat("javascript.builtins.Infinity")}}</p>
+
+
+<h2 id="參見">參見</h2>
+
+<ul>
+ <li>{{jsxref("Number.NEGATIVE_INFINITY")}}</li>
+ <li>{{jsxref("Number.POSITIVE_INFINITY")}}</li>
+ <li>{{jsxref("Number.isFinite")}}</li>
+</ul>