FLUTTER INTERVIEW QUESTIONS

What is a (fat)arrow syntax in Dart?

=> expression

For functions that contain just one expression, you can use short version with => that basically does {return expression;}

void main() {
  function1(1);   //arg was not 3
  function2(1);   //arg was not 3
  function1(3);   //arg was 3
  function2(3);   //arg was 3
}
void function1(int a) {
  if (a == 3) {
    print('arg was 3');
  } else {
    print('arg was not 3');
  }
}
void function2(int a) => print('arg was ${a == 3 ? '' : 'not '}3');

📖 Use https://dartpad.dartlang.org/ for testing examples 📖