| # Welcome! |
| |
| Welcome to the Dart API reference documentation, covering the |
| [Dart core libraries](https://dart.dev/guides/libraries). These include: |
| |
| * [dart:core](dart-core/dart-core-library.html): Core functionality such as |
| strings, numbers, collections, errors, dates, and URIs. |
| * [dart:io](dart-io/dart-io-library.html): I/O for non-web apps. |
| * [dart:async](dart-async/dart-async-library.html): Functionality for |
| asynchronous programming with futures, streams, and zones. |
| |
| You'll also find reference documentation covering Dart's |
| various platform interoperability options, such as: |
| |
| * [dart:js_interop](dart-js_interop/dart-js_interop-library.html): |
| Library including a sound type hierarchy and helper functions |
| for interoperability with JavaScript. |
| * [package:web](https://pub.dev/documentation/web): |
| DOM manipulation for web apps. |
| * [dart:ffi](dart-ffi/dart-ffi-library.html): Foreign function interfaces for |
| interoperability with the C language. |
| |
| The core libraries - except for `dart:core` - must be imported before they're |
| available for use: |
| |
| ```dart |
| import 'dart:math'; |
| ``` |
| |
| Additionally, you can find Dart packages at [pub.dev](https://pub.dev). |
| |
| ## Language docs |
| |
| The main site for learning and using Dart is [dart.dev](https://dart.dev). |
| Check out these pages: |
| |
| * [Dart overview](https://dart.dev/overview) |
| * [Dart language documentation](https://dart.dev/language) |
| * [Library tour](https://dart.dev/libraries) |
| * [Tutorials](https://dart.dev/tutorials) |
| |
| This API reference is generated from the SDK source at |
| [dart-lang/sdk](https://github.com/dart-lang/sdk). If you'd like to give |
| feedback on or edit this documentation, see |
| [Contributing](https://github.com/dart-lang/sdk/blob/main/CONTRIBUTING.md). |
