34 lines
986 B
Markdown
34 lines
986 B
Markdown
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---
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title: Access Multi-Dimensional Arrays With Indexes
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---
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## Access Multi-Dimensional Arrays With Indexes
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<!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds -->
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Consider the following multi-dimensional array:
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```javascript
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var arr = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]];
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```
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This is what it looks like in tabular form.
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| Position | 0 | 1 | 2 | 3 |
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| --- |---|---|---|---|
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| **0** | 1 | 4 | 7 | 10|
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| **1** | 2 | 5 | 8 | 11|
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| **2** | 3 | 6 | 9 | 12|
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Now all you have to do, is choose the coordinates of the data you desire! For examples, if we want `myNum` to equal 8, then...
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```javascript
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var myNum = arr[2][1]; // Equal to 8
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```
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Or, if you want it to equal 1. You do...
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```javascript
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var myNum = arr[0][0]; // Equal to 1
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```
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You first start off by choosing what column the number is in, then you choose the row. It's kind of like the x-y coordinate plane!
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