ngOnInit life cycle hook.

 The ngOnInit lifecycle hook is part of Angular's component lifecycle, and it is called during the initialization phase of a component. This hook is invoked once after Angular has set up the component and its input properties but before rendering the component or calling any other lifecycle hooks.

Here is a breakdown of the ngOnInit lifecycle hook:

• Initialization of Component:
• The ngOnInit hook is called after Angular has initialized the component, but before the component is rendered on the view.
• Usage for Initialization Logic:
• Developers often use ngOnInit to perform initialization tasks such as retrieving data from a service, setting default property values, or any other setup required for the component.
• Access to Component Inputs:
• At the time ngOnInit is called, Angular has already initialized the component's input properties, and they are accessible within this hook.
• Dependency Injection:
• If the component has dependencies that need to be injected, ngOnInit is a suitable place to access those dependencies.

 Here's a simple example to illustrate the use of the ngOnInit hook: