unique_random_numbers.dart

import 'dart:math';

main() {
  var rng = Random();
  
  final list = <int>[];
  
  while (list.length < 10) {
    final int randomNumber = rng.nextInt(100);
    
    if (list.contains(randomNumber)) continue;
    
    list.add(randomNumber);
  }
  
  print(list);
}