divideAfterThreeChar method

Implementation

String divideAfterThreeChar() {
  String newStr = "";
  List<String> strList = [];
  for (int i = 0; i < this.length; i++) {
    if ((i % 3 == 0) & (i > 0)) {
      strList.add(' ');
    }
    strList.add(this[i]);
  }
  newStr = strList.join();
  return newStr;
}