Dart 101 App.dart

App.dart

import './hardwareandro.dart';

void main() {
  var val1 = "string1";
  String val2 = "string2,asdasd";

  int _int1 = 15;
  var int1 = 5;

  bool _bool = true;
  bool bool_ = false;

  List<int> _list = [1, 2, 3];
  var list = ["adasd", 1, false];
  // print(val1);
  // print(_int1);
  // print("${list[0]} ${int1}");

  var _split = val2.split(",");
  var _toString = int1.toString();

  if (_int1 > 0) {
    // print("okey");
  } else {
    // print("false");
  }

  bool isOkey = _list.length > 0 ? true : false;
  // print(isOkey);

  for (var item in _list) {
    // print(item.toString());
  }
  for (var i = 0; i < int1; i++) {
    // print(i);
  }

  sum(5, 10);
  var total = _sum(4, 32);
  print(total);

  /**
   * final use runtime & immutable veriable
   */
  final _final1 = DateTime.now();
  /**
   * const use commpiler time && immutable
   */
  const _const1 = 12;

  var hwa1 = new HardwareAndro("videoTitle", "author", 15);
  hwa1.channel = 6;
  print(6);

  var hwa2 = new HardwareAndro.MyCustructor("asdasd");
  // print(hwa2.videoTitle);
  // print(hwa2.number);
}

// void sum(int val1, int val2) {
//   print("result : ${(val1 + val2)}");
// }

/**
 * optional param
 */
sum(int val1, [int val2]) {
  print("result : ${(val1 + val2)}");
}

// int _sum(int val1, int val2) {

// }
/**
 * return value
 */
_sum(int val1, int val2) {
  return val1 + val2;
}

/**
 * arrow function
 */
// sum(int val1, [int val2]) =>  print("result : ${(val1 + val2)}");

// _sum(int val1, int val2) => val1 + val2;