how to use the font family in flutter text code example

Example 1: flutter font bold

Text(
  'Some text',
  style: TextStyle(
    fontSize: 24,
    fontWeight: FontWeight.bold),
)

Example 2: flutter set default font family for whole app

MaterialApp(
  title: 'Custom Fonts',
  // Set Raleway as the default app font.
  theme: ThemeData(fontFamily: 'Raleway'),
  home: MyHomePage(),
);