If_Else_Dart

 import "dart:io";

class User {
  var uname, password, mobileno, uname1, password1, mobileno1;
  void registration(String a, int b, int c) {
    uname = a;
    password = b;
    mobileno = c;
  }
  void login(String x, int y, int z) {
    uname1 = x;
    password1 = y;
    mobileno1 = z;
    if(uname1 == uname && password1 == password && mobileno1 == mobileno) {
      print("Login Successfully completed, Congratulations!");
      print("Please Enter your Ege : ");
      var age = stdin.readLineSync();
      if(int.parse(age!) >= 18) {
        print("Which Vehicle you had driving ?");
        print("Two Wheeler");
        print("Four Wheeler");
        var wheel = stdin.readLineSync();
        if(wheel == "Two Wheeler") {
          print("Now you are perfectly Eligible for Voting because Four Wheel is dangerous for accident");
          print("Please Select your Nationality from below Options : ");
          print("Indian\nPakistani\nCanadian\nRussian\nAmerican\nArabi");
          var nation = stdin.readLineSync();
          if(nation == "Indian") {
            print("You are Eligible because you are Indian");
            print("Which party you will select for Voting from below");
            print("BJP\nCongress\nAAP\nBSP\nOther party");
            var party = stdin.readLineSync();
            if(party == "BJP") {
              print("Your Voting in BJP");
            } else if(party == "Congress") {
              print("Your Voting in Congress");
            } else if(party == "AAP") {
              print("Your Voting in AAP");
            } else if(party == "BSP") {
              print("Your Voting in BSP");
            } else {
              print("Your Voting in Other party");
            }
          } else {
            print("Sorry, you are not Eligible because you are not Indian");
          }
        } else {
          print("Sorry, you are not Eligible for Voting");
        }
      } else {
        print("You are Not Eligible for Voting!");
      }
    } else {
      print("Oops, Login Failed!");
    }
  }
}
void main() {
  User userObject = new User(); //  Creating object of class

  print("Please Enter Username : ");
  var us = stdin.readLineSync();
  print("Please Enter Password : ");
  var pa = stdin.readLineSync();
  print("Please Enter Mobile Number : ");
  var mo = stdin.readLineSync();
  print("Registration Successfully completed!");
  userObject.registration(us!, int.parse(pa!), int.parse(mo!));

  print("Please Enter Username : ");
  var us1 = stdin.readLineSync();
  print("Please Enter Password : ");
  var pa1 = stdin.readLineSync();
  print("Please Enter Mobile Number : ");
  var mo1 = stdin.readLineSync();
  userObject.login(us1!, int.parse(pa1!), int.parse(mo1!));
}