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Angular applications are made up of components. A component is the combination of an HTML template and a component class that controls a portion of the screen. Here is an example of a component that displays a simple string:
Try this **<live-example noDownload>QuickStart example on Plunker</live-example>** without installing anything.
Try it locally with the [***QuickStart seed***](guide/setup)
and prepare for development of a real Angular application.
Every component begins with an @Component !{_decorator}
function that
takes a metadata object. The metadata object describes how the HTML template and component class work together.
The selector property tells Angular to display the component inside a custom <my-app> tag in the index.html.
The template property defines a message inside an <h1> header.
The message starts with "Hello" and ends with {{name}},
which is an Angular interpolation binding expression.
At runtime, Angular replaces {{name}} with the value of the component's name property.
Interpolation binding is one of many Angular features you'll discover in this documentation.
### Next step
Start [**learning Angular**](guide/learning-angular).