ng new my-angular-app
cd my-angular-app
ng generate component home
ng generate component about
ng generate component contact

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { HomeComponent } from './home/home.component';
import { AboutComponent } from './about/about.component';
import { ContactComponent } from './contact/contact.component';

const routes: Routes = [
  { path: '', component: HomeComponent },
  { path: 'about', component: AboutComponent },
  { path: 'contact', component: ContactComponent },
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { HomeComponent } from './home/home.component';
import { AboutComponent } from './about/about.component';
import { ContactComponent } from './contact/contact.component';

@NgModule({
  declarations: [
    AppComponent,
    HomeComponent,
    AboutComponent,
    ContactComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

<!-- app.component.html -->
<nav>
  <ul>
    <li><a routerLink="/">Home</a></li>
    <li><a routerLink="/about">About</a></li>
    <li><a routerLink="/contact">Contact</a></li>
  </ul>
</nav>
<router-outlet></router-outlet>

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

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.css']
})
export class HomeComponent {
  title = 'Home Page';
}

<!-- home.component.html -->
<div>
  <h1>{{ title }}</h1>
  <p>Welcome to the Home Page!</p>
</div>

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

@Component({
  selector: 'app-about',
  templateUrl: './about.component.html',
  styleUrls: ['./about.component.css']
})
export class AboutComponent {
  title = 'About Page';
}

<!-- about.component.html -->
<div>
  <h1>{{ title }}</h1>
  <p>Learn more about us on this page.</p>
</div>

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

@Component({
  selector: 'app-contact',
  templateUrl: './contact.component.html',
  styleUrls: ['./contact.component.css']
})
export class ContactComponent {
  title = 'Contact Page';
}

<!-- contact.component.html -->
<div>
  <h1>{{ title }}</h1>
  <p>Get in touch with us!</p>
</div>