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Angular, a popular JavaScript framework developed by Google, is built on several key building blocks that work together to create robust and scalable web applications. The main building blocks of Angular are:

• Modules: Angular applications are modular in nature and consist of one or more modules. A module is a container for related components, services, directives, and other artifacts. It helps organize and encapsulate different parts of an application.

• Components: Components are the basic building blocks of an Angular application's user interface. Each component represents a part of the application with its own logic, template, and styling. Components are reusable and can be nested within other components to create complex UI structures.

• Templates: Templates define the structure and layout of an Angular component's view. They use HTML enhanced with Angular-specific syntax, such as data binding, directives, and event handlers, to render dynamic content and interact with the component's logic.

• Directives: Directives are markers on elements that allow you to extend HTML with custom behavior and manipulate the DOM. Angular provides built-in directives like ngFor, ngIf, and ngStyle, as well as the ability to create custom directives to add application-specific functionality.

• Services: Services are used to provide shared functionality and data across different parts of an Angular application. They are responsible for handling data retrieval, business logic, and communication with external APIs. Services can be injected into components or other services, enabling dependency injection and promoting reusability.

• Dependency Injection (DI): Angular leverages dependency injection to manage the creation and resolution of dependencies. DI allows components and services to declare their dependencies and have them provided by an injector. This promotes modularity, testability, and flexibility in an application.

• Data Binding: Angular offers powerful data binding capabilities, enabling synchronization between the component's data model and the UI. It supports both one-way and two-way data binding, allowing you to automatically update the view when the data changes, and vice versa.

• Routing: Angular provides a router module that allows for navigation between different views or components based on the current URL. It enables the creation of single-page applications (SPAs) by mapping URLs to specific components and managing their state.

These building blocks work together to create a structured and maintainable Angular application. By leveraging modules, components, templates, services, directives, dependency injection, data binding, and routing, developers can build complex web applications with ease.