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Welcome to the Dart API reference documentation, covering the core Dart API
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libraries. Some of the most fundamental Dart libraries include:
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* [dart:core](dart-core/dart-core-library.html): Core functionality such as
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strings, numbers, collections, errors, dates, and URIs.
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* [dart:html](dart-html/dart-html-library.html): DOM manipulation for web apps
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(available only to web apps).
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* [dart:io](dart-io/dart-io-library.html): I/O for non-web apps.
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Except for `dart:core`, you must import a library before you can use it. Here's
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an example of importing `dart:async` and `dart:math`:
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```dart
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import 'dart:async';
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import 'dart:math';
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```
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You can install more libraries using the
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[pub package manager](https://www.dartlang.org/tools/pub).
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The main site for learning and using Dart is
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[www.dartlang.org](https://www.dartlang.org). Check out these pages:
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* [Get started](https://www.dartlang.org/guides/get-started)
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* [Language tour](https://www.dartlang.org/guides/language/language-tour)
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* [Library tour](https://www.dartlang.org/guides/libraries/library-tour)
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* [Sample code](https://www.dartlang.org/samples)
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This API reference is automatically generated from source code in the [Dart
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SDK project](https://github.com/dart-lang/sdk).
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If you'd like to give feedback or edit this documentation, see
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[Contributing](https://github.com/dart-lang/sdk/wiki/Contributing).
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