create random string with numbers dart
import 'dart:math'; void main() { print(getRandomString(5)); // 5GKjb print(getRandomString(10)); // LZrJOTBNGA print(getRandomString(15)); // PqokAO1BQBHyJVK } import 'dart:math'; String generateRandomString(int len) { var r = Random(); const _chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890'; return List.generate(len, (index) => _chars[r.nextInt(_chars.length)]).join(); }