In Angular, a component is a fundamental building block of the application's user interface. It represents a part of the UI that controls a specific view and behavior. Components are typically composed of three main parts: the component class, the component template (HTML), and the component stylesheet (CSS). Here's an example of an Angular component: Suppose we want to create a simple component to display information about a user: 1. Create the component class: 

// user.component.ts
import { Component } from '@angular/core';

@Component({
  selector: 'app-user', // The component selector used in HTML templates
  templateUrl: './user.component.html', // The path to the HTML template file
  styleUrls: ['./user.component.css'] // The path to the CSS styles for this component
})
export class UserComponent {
  userName: string = 'test user';
  age: number = 30;
}
2. Create the component template: 

<!-- user.component.html -->
<div>
  <h2>User Information</h2>
  <p><strong>Name:</strong> {{ userName }}</p>
  <p><strong>Age:</strong> {{ age }}</p>
</div>
3. Create the component stylesheet (optional): 

/* user.component.css */
div {
  border: 1px solid #ccc;
  padding: 10px;
  margin: 10px;
}
4. Register the component in the AppModule (or another relevant module): 

// app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { UserComponent } from './user.component'; // Import the UserComponent

@NgModule({
  imports: [BrowserModule],
  declarations: [UserComponent], // Declare the UserComponent
  bootstrap: [UserComponent] // Set the UserComponent as the bootstrap component
})
export class AppModule { }
Now, you can use the `app-user` selector in your application's HTML to display the user information: 

<!-- app.component.html -->
<div>
  <app-user></app-user> <!-- This will render the UserComponent -->
</div>
When the application runs, it will display the following output: 

User Information
Name: test user
Age: 30
This is a basic example of an Angular component, and in real-world applications, components are used extensively to build complex user interfaces by combining and nesting them as needed.