Week 4 Day 2: Implemented Angular services and dependency injection

Week-4/Day-2/angular-services.md

@@ -0,0 +1,34 @@
+## Angular Services & Dependency Injection
+
+### What is a Service?
+A service is used to store reusable business logic that can be shared across multiple components.
+Examples:
+- Fetching data
+- Authentication logic
+- Utility functions
+
+### Why Services are Needed?
+- Avoids code duplication
+- Improves maintainability
+- Follows separation of concerns
+
+### Creating a Service
+ng generate service data
+
+### Dependency Injection (DI)
+Angular automatically provides services to components using DI.
+constructor(private dataService: DataService) {}
+
+### Using Service Methods
+getMessage() {
+  return "Welcome to Angular Services";
+}
+
+### Practical Work Done
+- Created services
+- Injected services into components
+- Shared data between components
+- Tested service methods
+
+### Learning Outcome
+Understood how Angular manages shared logic efficiently using services and dependency injection.