mhmadip

import 'package:flutter/material.dart';

void main() => runApp(MaterialApp(
      title: "Hello Rectangle",
      home: Scaffold(
        appBar: AppBar(
          title: Text("Rectangle App"),
        ),
        body: RectangleApp(),
      ),

mhmadip

int sum(List<int> intList, int index) {
  if (index == 0) {
    return intList[index];
  } else {
    return intList[index] + sum(intList, index - 1);
  }
}

void main() {
  var test = [4, 2, 3, 4];

mhmadip

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
    debugShowCheckedModeBanner: false,
    title: 'My Company App',
    home: MyHomeScreen(),
  ));
}

mhmadip

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(
          title: Text("Hello Switch"),
        ),

mhmadip

 import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget { @override
Widget build(BuildContext context) {
  return MaterialApp( home: MyHomePage(),
  ); }
}
class MyHomePage extends StatefulWidget { MyHomePage();
@override
createState() => _MyHomePageState();

mhmadip

// Chapter 5: Control Flow Statements
void main() {
//if statment
  var testList = [2, 4, 8, 16, 32];
  print(testList);
  if (testList.isNotEmpty) {
    print("Emptying List");
    testList.clear();
  }
  print(testList);

mhmadip

import 'dart:io';
int sumEven(List li) {
  int sum = 0;
  for (var i in li) {
    if (i % 2 == 0) {
      sum = sum + i;
    }
    }
  return sum; 
  }

mhmadip

//Enumerated types, often called enumerations or enums,
// are a special kind of class used to represent a fixed number of constant values.
//Declare an enumerated type using the enum keyword:
enum Color { red, green, blue }
//To get a list of all of the values in the enum, use the enum’s values constant.
List<Color> colors = Color.values;

void main() {
//You can use trailing commas when declaring an enumerated type.
//

mhmadip

// classes and objects example
/*
class Car{
  int numberOfDoors=5;
  void drive(){
    print('wheels start turning');
  }

}
void main(){

mhmadip

class Object {
  int id = 0;
  String name='abc';
 Object(this.id);
  
  @override
  String toString()=> id.toString() + name;
}

void main() {