password validation

main.dart

bool validatePassword(String password) {
  // Check if the password has exactly 6 characters
  if (password.length != 6) {
    return false;
  }

  // Check if the password contains at least one uppercase letter
  bool hasUppercase = false;
  for (int i = 0; i < password.length; i++) {
    if (password[i] == password[i].toUpperCase() && password[i] != password[i].toLowerCase()) {
      hasUppercase = true;
      break;
    }
  }

  // Check if the password contains at least one lowercase letter
  bool hasLowercase = false;
  for (int i = 0; i < password.length; i++) {
    if (password[i] == password[i].toLowerCase() && password[i] != password[i].toUpperCase()) {
      hasLowercase = true;
      break;
    }
  }

  // Return true only if all conditions are met
  return hasUppercase && hasLowercase;
}

void main() {
  // Example usage:
  String passwordToCheck = "AbCdEf";
  if (validatePassword(passwordToCheck)) {
    print("Password is valid!");
  } else {
    print("Password is invalid.");
  }
}