# Builtins overview

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import { Badge } from "zudoku/ui/Badge"

Builtins are functions available inside form0 expressions. You can use them in calculated fields
and in `form.events.code` without importing anything.

## Where builtins are used

- **CalculatedField** expressions (`calculate`)
- **Event code** (`form.events.code`)

## Categories

| Category                                   | Example builtins                 |
| ------------------------------------------ | -------------------------------- |
| <Badge variant="secondary">Logical</Badge> | `IF`, `AND`, `OR`                |
| <Badge variant="secondary">Math</Badge>    | `ROUND`, `CEILING`               |
| <Badge variant="secondary">String</Badge>  | `UPPER`                          |
| <Badge variant="secondary">Choice</Badge>  | `CHOICEVALUE`, `CHOICELABEL`     |
| <Badge variant="secondary">Schema</Badge>  | `DATANAMES`                      |
| <Badge variant="secondary">Control</Badge> | `SETRESULT`, `EVAL`              |
| <Badge variant="secondary">Events</Badge>  | `ON`, `OFF`, `ALERT`, `SETVALUE` |

Next:

- [Calculations & expressions](/core/builtins/calculations-expressions-overview)
- [Events](/core/builtins/events-overview)