How does navigation work in Flutter?

Flutter navigation system:\n\n**Navigator class:**\n• Manages stack of routes\n• Push/pop operations\n• Named routes support\n\n**Basic navigation:**\n\n// Push new screen\nNavigator.push(context, MaterialPageRoute(\n builder: (context) => SecondScreen()\n));\n\n// Pop current screen\nNavigator.pop(context);\n\n\n**Named routes:**\n\n// Define routes\nroutes: {\n '/second': (context) => SecondScreen(),\n}\n\n// Navigate\nNavigator.pushNamed(context, '/second');\n\n\n**Passing data:**\n• Constructor parameters\n• Route arguments\n• Return values from pop()