flutter convert double to int

  double x = 2.5;
 
  int a = x.toInt();
  int b = x.truncate();
  int c = x.round();
  int d = x.ceil();
  int e = x.floor();
 
  print(a); // 2
  print(b); // 2
  print(c); // 3
  print(d); // 3
  print(3); // 2

int calc_ranks(ranks) {
    double multiplier = .5;
    return (multiplier * ranks).round();
}