How do you write a switch-case statement in Dart?

In Dart, a switch-case statement is used to execute different code blocks based on the value of a variable. It’s a cleaner alternative to multiple if-else statements when checking a single value. Each case represents a possible value, and the default case handles any unmatched values.

Here’s an example:

void main() {
  String day = 'Monday';

  switch (day) {
    case 'Monday':
      print('Start of the week');
      break;
    case 'Friday':
      print('Almost weekend');
      break;
    case 'Sunday':
      print('Weekend!');
      break;
    default:
      print('Midweek day');
  }
}

I’ve applied switch-case statements in Flutter projects for state management and UI rendering. For example, based on a Here, day is checked against each case. The break statement is used to prevent fall-through; if omitted, Dart will throw an error unless the case is empty.

I’ve applied switch-case statements in Flutter projects for state management and UI rendering. For example, based on a user role like 'admin', 'editor', or 'viewer', I used switch-case to display different screens or enable/disable certain buttons.

A challenge I faced was remembering that Dart does not allow fall-through between cases, unlike some other languages, so every case must end with break, return, or be empty. A limitation is that switch-case works only with compile-time constant values (like int, String, or enums). For more complex conditions, I used if-else statements or polymorphism to handle dynamic cases.
user role like 'admin', 'editor', or 'viewer', I used switch-case to display different screens or enable/disable certain buttons.