# Square brackets: lists and indexing

[Syntax and values](README.md)

## Behavior and details

Square brackets create a List when used as a primary expression, or index a preceding value. List items are comma-separated and may span lines with a trailing comma. An index must refer to an existing element or Map key. Brackets do not provide slices, ranges, or comprehensions.

## Example

```pliro
# language: en
let items = [10, 20, 30,]
say items[1]
```

## Related entries

[Syntax and values](README.md) · [Built-ins](../builtins/README.md) · [Programming guides](../guides/README.md)