Answers for "font style in flutter"

flutter font bold

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

flutter text font family

Text(
  "Hello",
  style: TextStyle(fontFamily: 'Raleway'),
)

https://flutter.dev/custom-fonts/#from-packages

flutter:
  fonts:
    - family: Raleway
      fonts:
        - asset: fonts/Raleway-Regular.ttf
        - asset: fonts/Raleway-Italic.ttf
          style: italic
    - family: RobotoMono
      fonts:
        - asset: fonts/RobotoMono-Regular.ttf
        - asset: fonts/RobotoMono-Bold.ttf
          weight: 700

flutter font family

final String? fontFamily;