What Is Inversion of Control?
Inversion of control is a pattern in which the flow of execution is handed to an external framework or container that calls your code at the right moments, rather than your code driving every call. Dependency injection is a common form, where collaborators are supplied to a component instead of being created by it. Your components describe what they need and the container wires it up.
Why it matters
Letting a container own object creation and lifecycle keeps components loosely coupled and easy to reconfigure. It centralizes wiring so swapping implementations is a configuration change.
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