17 lines
523 B
Markdown
17 lines
523 B
Markdown
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---
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title: Access Array Data with Indexes
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localeTitle: 使用索引访问数组数据
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---
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## 使用索引访问数组数据
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数组的第一个元素位于零位。因此，如果要访问数组的第一个元素，可以这样做：
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```javascript
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var arr = ["Programming", 123, "Coding", 789];
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var firstElem = arr[0] // This is "Programming"
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var thirdElem = arr[2] // This is "Coding"
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var fourthElem = arr[3] // This is 789
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```
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请注意，数组的长度为4，并且数组的最后一个元素的位置为3。
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