Production-Ready app

ErrorHandling.dart

void checkNumber(Either<String,int> number){
  number.fold(
    (l) => print(l),
    (r) => print('Number: $r'), 
  );
}


void errorHandle() {
  Either<String, int> number;
  
  number= Right(1); //When number loads successfully
  checkNumber(number); //Prints Number: 1

  number = Left('An error occured');  //When an error occured while loading number
  checkNumber(number);  //Prints An error occured
}