Arrays for Beginners

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2-dimensional arrays

A 2-dimensional array has a width dimension (x) and a height dimension (y). For example, a 5x5 2-dimensional array would look like this:

The index of the top-left cell is (0,0) ie. x = 0, y = 0. The bottom-right cell is (4,4).

Looping, comparing and setting values is done in a similar way except now we need to specify both the x and y indices.

Example use for a 2-dimensional array

2-d arrays are great for representing grids and so they have a lot of uses in 2d games.

Let’s say we have a block sprite with 3 different colour animations. We want to place 12 blocks in a 4x3 grid and give them random colours. Well, we can use a 2-d array to represent the grid and we can set each cell of the array to a random colour.

Then to display our grid, we loop through the array and create a sprite with it’s position based on the current array indices and it’s animation based on the current array value.


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  • Hi, what's going on with second and other pages of this tutorial - it shows just an error...

  • Thank you very much.

    With new version we can change WebStorage plugin to LocalStorage plugin, And use LocalStorage On item "array_save_example" event for set animals when LocalStorage Get item "array_save_example" loaded

    1. btn loadArray on clicked > LocalStorage Get item "array_save_example"

    2. LocalStorage On item "array_save_example" get > animals Load from Json string LocalStorage.ItemValue

    • Thanks for trying to provide an update to the Webstorage reference. i'm totally lost from your update however. i'll have to find a more up to date tutorial.

  • Thanks for very good and important topic with detailed explanation

  • Best writing on arrays

  • Thank u, it helps a lot. 😁😁😁😬😬😬😬