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Decorator are simple annotations that we can add to our class using the @ symbol along with a function. they provide instruction (metadata) for the use of our classes. in the case of angular decorator allow us to identity our class as component.

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Decorators are simple annotations that we can add to our classes using the @ symbol along with a function.They provide instructions (called metadata) for the use of our classes. In the case of Angular, decorators allow us to identify our classes as Angular components.

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Component are basic building block of an angular application . But how do we then organize these building blocks into complete applications ? Angular module provide the answer to this question.

They enable us to combine our component into reusable group of functionality that can be exported and imported throught our application.