> For the complete documentation index, see [llms.txt](https://docs.sannybuilder.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sannybuilder.com/troubleshooting/errors/0018.md).

# 0018: Invalid array size

You did not specify the size of the array in the [declaration](/language/data-types/arrays.md#array-declaration), or provided an invalid value (for example, a string instead of a number).

**Possible solutions:** use a valid integer value:

```pascal
var $coords: array of Float // incorrect, size is missing
```

```pascal
var $coords: array 10 of Float // correct
```