# 0019: Unknown array type

You did not specify the array [type](https://docs.sannybuilder.com/language/data-types/arrays#array-declaration), or provided an invalid value (for example, a number).

**Possible solutions:** use a valid type name:

```pascal
var
    $var: array 10 of Double // incorrect
    $var: array 10 of Float // correct
end
```