What is the difference between a Navigator.pop() and a Navigator.push() in Flutter?

`Navigator.push()` and `Navigator.pop()` are two methods of the Flutter `Navigator` class that are used for managing the navigation stack.

`Navigator.push()` is used to push a new route onto the stack, which becomes the current route and is displayed on the screen. This method takes two arguments: `BuildContext` and `Route`. The `BuildContext` is required and is used to locate the Navigator widget in the widget tree. The `Route` argument specifies the widget to be displayed on the new route.

On the other hand, `Navigator.pop()` is used to remove the current route from the stack and return to the previous route. This method also takes the `BuildContext` argument to locate the Navigator widget.

In other words, `Navigator.push()` is used to navigate to a new screen or page, while `Navigator.pop()` is used to go back to the previous screen or page.

Here's an example of how to use `Navigator.push()` and `Navigator.pop()`:

// Push a new route onto the stack
Navigator.push(
  context,
  MaterialPageRoute(builder: (context) => MyNewRoute()),
);

// Pop the current route off the stack
Navigator.pop(context);

In this example, `MyNewRoute()` is a widget that represents the new screen to be displayed when `Navigator.push()` is called. When `Navigator.pop()` is called, it removes the current route from the stack and returns to the previous route.