---
key: tsys/optional
kind: typeSystem
name: "Optional"
url: https://plangs.page/type-system/optional
---

# Optional

Allows for type annotations to be included or omitted, offering flexibility between static and dynamic typing.

## Facts

- Homepage: https://en.wikipedia.org/wiki/Optional_typing

## Relationships

### Plangs

- [Dart](https://plangs.page/dart)
- [Julia](https://plangs.page/julia)
- [Nickel](https://plangs.page/nickel)
- [Python](https://plangs.page/python)
- [TypeScript](https://plangs.page/typescript)