cccNumberValidator function

String? cccNumberValidator(
  1. dynamic val
)

Implementation

String? cccNumberValidator(dynamic val) {
  final String value = val as String;
  if (value.isEmpty) {
    return 'Your CCC number is required';
  }
  if (value.length < 7 || value.length > 15) {
    return 'Enter a valid CCC number';
  }
  return null;
}