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Oct 14, 2025
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Document non-default array length types #114

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8 changes: 8 additions & 0 deletions docs/tutorials/programming-language/main/02-00-basics/02-04-data-types.md
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Expand Up @@ -169,6 +169,14 @@ int[] a = new int[10];
int[] b = { 2, 4, 6, 8 };
```

By default, the type of the array length is `int`, but a different type
can be specified. For example, `uint8[:size_t] data` declares an array
whose indices are `size_t`, which can therefore store any number of
bytes that can be addressed (an `int`-indexed array can only have up to
2^32 elements). Conversely, `string[] list = new string[10:uint8]`
declares an array whose indices are bytes, which might be useful to save
memory when many small array indices are stored.

You can slice an array with `[start:end]`:

```vala
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