What is the role of the IoC container within the Spring framework and why is it used?

The IoC (Inversion of Control) container in Spring is responsible for managing the lifecycle and dependencies of objects (beans). Instead of manually creating and wiring objects, the developer describes the configuration, and the container automatically creates instances and injects the necessary dependencies.

This allows:

• Simplifying dependency management and increasing code modularity.
• Facilitating testing, as dependencies can be easily replaced.
• Reducing component coupling.

Example: if class A depends on class B, the IoC container will create an object of B and pass it to A without the need to write code to create B inside A.