Step 00 - Getting Started with Programming

Step 02 - Launch JShell

Step 03 - Break Down Multiplication Table Challenge

Step 04 - Java Expression - An Introduction

Step 05 - Java Expression - Exercises

Step 06 - Java Expression - Puzzles

Step 07 - Printing output to console with Java

Step 08 - Printing output to console with Java - Exercise Statements

Step 09 - Printing output to console with Java - Exercise Solutions

Step 10 - Printing output to console with Java - Puzzles

Step 11 - Advanced Printing output to console with Java

Step 12 - Advanced Printing output to console with Java - Exercises

Step 13 - Introduction to Variables in Java

Step 14 - Introduction to Variables in Java - Exercises and Puzzles

Step 15 - 4 Important Things to Know about Variables in Java

Step 16 - How are variables stored in memory?

Step 17 - How to name a variable?

Step 18 - Understanding Primitive Variable Types in Java

Step 19 - Understanding Primitive Variable Types in Java - Choosing a Type

Step 20 - Java Assignment Operator

Step 21 - Java Assignment Operator - Puzzles on Increment, Decrement and Compoun

Step 22 - Programming Tips : JShell - Shortcuts, Multiple Lines and Variables

Step 23 - Java Conditionals and If Statement - Introduction

Step 24 - Java Conditionals and If Statement - Exercise Statements

Step 25 - Java Conditionals and If Statement - Exercise Solutions

Step 26 - Java Conditionals and If Statement - Puzzles

Step 27 - Java For Loop to Print Multiplication Table - Introduction

Step 28 - Java For Loop to Print Multiplication Table - Exercise Statements

Step 29 - Java For Loop to Print Multiplication Table - Exercise Solutions

Step 30 - Java For Loop to Print Multiplication Table - Puzzles

Step 31 - Getting Started with Programming - Revise all Terminology

Step 00 - Section 02 - Methods - An Introduction

Step 02 - Introduction to Java Methods - Exercises and Puzzles

Step 03 - Programming Tip - Editing Methods with JShell

Step 04 - Introduction to Java Methods - Arguments and Parameters

Step 05 - Introduction to Java Method Arguments - Exercises

Step 06 - Introduction to Java Method Arguments - Puzzles and Tips

Step 07 - Getting back to Multiplication Table - Creating a method

Step 08 - Print Multiplication Table with a Parameter and Method Overloading

Step 09 - Passing Multiple Parameters to a Java Method

Step 10 - Returning from a Java Method - An Introduction

Step 11 - Returning from a Java Method - Exercises

Step 99 - Methods - Section Review

Step 00 - Section 03 - Overview Of Java Platform - Section Overview

Step 01 - Overview Of Java Platform - An Introduction - java, javac, bytecode an

Step 02 - Java Class and Object - First Look

Step 03 - Create a method in a Java class

Step 04 - Create and Compile Planet.java class

Step 05 - Run Planet class with Java - Using a main method

Step 06 - Play and Learn with Planet Class

Step 07 - JDK vs JRE vs JVM

Step 00 - Installing Eclipse

Step 01 - Creating a New Java Project with Eclipse

Step 02 - Your first Java class with Eclipse

Step 03 - Writing Multiplication Table Java Program with Eclipse

Step 04 - Adding more methods for Multiplication Table Program

Step 05 - Programming Tip 1 : Refactoring with Eclipse

Step 06 - Programming Tip 2 : Debugging with Eclipse

Step 07 - Programming Tip 3 : Eclipse vs JShell - How to choose?

Step 00 - Introduction to Object Oriented Programming - Section Overview

Step 01 - Introduction to Object Oriented Programming - Basics

Step 02 - Introduction to Object Oriented Programming - Terminology - Class, Obj

Step 03 - Introduction to Object Oriented Programming - Exercise - Online Shopping

Step 04 - Create Motor Bike Java Class and a couple of objects

Step 05 - Exercise Solutions - Book class and Three instances

Step 06 - Introducing State of an object with speed variable

Step 07 - Understanding basics of Encapsulation with Setter methods

Step 08 - Exercises and Tips - Getters and Generating Getters and Setters with Eclipse

Step 09 - Puzzles on this and initialization of member variables

Step 10 - First Advantage of Encapsulation

Step 11 - Introduction to Encapsulation - Level 2

Step 12 - Encapsulation Exercises - Better Validation and Book class

Step 13 - Introduction to Abstraction

Step 14 - Introduction to Java Constructors

Step 15 - Introduction to Java Constructors - Exercises and Puzzles

Step 16 - Introduction to Object Oriented Programming - Conclusion

Step 00 - Primitive Data Types in Depth - Section Overview

Step 01 - Basics about Java Integer Data Types - Casting, Operators and More

Step 02 - Java Integer Data Types - Puzzles - Octal, Hexadecimal, Post and Pre increment

Step 03 - Java Integer Data Types - Exercises - BiNumber - add, multiply and double

Step 04 - Java Floating Point Data Types - Casting , Conversion and Accuracy

Step 05 - Introduction to BigDecimal Java Class

Step 06 - BigDecimal Puzzles - Adding Integers

Step 07 - BigDecimal Exercises - Simple Interest Calculation

Step 08 - Java Boolean Data Type - Relational and Logical Operators

Step 09 - Java Boolean Data Type - Puzzles - Short Circuit Operators

Step 10 - Java Character Data Type char - Representation and Conversion

Step 11 - Java char Data Type - Exercises 1 - isVowel

Step 12 - Java char Data Type - Exercises 2 - isDigit

Step 13 - Java char Data Type - Exercises 3 - isConsonant, List Upper Case and Lower Case Char

Step 14 - Primitive Data Types in Depth - Conclusion

Step 00 - Conditionals with Java - Section Overview

Step 01 - Introduction to If Else Statement

Step 02 - Introduction to Nested If Else

Step 03 - If Else Statement - Puzzles

Step 04 - If Else Problem - How to get User Input in Java?

Step 05 - If Else Problem - How to get number 2 and choice from user?

Step 06 - If Else Problem - Implementing with Nested If Else

Step 07 - Java Switch Statement - An introduction

Step 08 - Java Switch Statement - Puzzles - Default, Break and Fall Through

Step 09 - Java Switch Statement - Exercises - isWeekDay, nameOfMonth, nameOfDay

Step 10 - Java Ternary Operation - An Introduction

Step 11 - Conditionals with Java - Conclusion

Step 00 - Java Loops - Section Introduction

Step 01 - Java For Loop - Syntax and Puzzles

Step 02 - Java For Loop - Exercises Overview and First Exercise Prime Numbers

Step 03 - Java For Loop - Exercise - Sum Upto N Numbers and Sum of Divisors

Step 04 - Java For Loop - Exercise - Print a Number Triangle

Step 05 - While Loop in Java - An Introduction

Step 06 - While Loop - Excercise - Cubes and Squares upto limit

Step 07 - Do While Loop in Java - An Introduction

Step 08 - Do While Loop in Java - An Example - Cube while user enters positive number

Step 09 - Introduction to Break and Continue

Step 10 - Selecting Loop in Java - For vs While vs Do While

Step 00 - Java Reference Types - Section Introduction

Step 01 - Reference Types - How are they stored in Memory?

Step 02 - Java Reference Types - Puzzles

Step 03 - String class - Introduction and Exercise - Print each word and char on

Step 04 - String class - Exercise Solution and Some More Important Methods

Step 05 - Understanding String is Immutable and String Concat, Upper Case, Lower

Step 06 - String Concatenation and Join, Replace Methods

Step 07 - Java String Alternatives - StringBuffer and StringBuilder

Step 08 - Java Wrapper Classes - An Introduction - Why and What?

Step 09 - Java Wrapper Classes - Creation - Constructor and valueOf

Step 10 - Java Wrapper Classes - Auto Boxing and a Few Wrapper Constants - SIZE,

Step 11 - Java Dates - Introduction to LocalDate, LocalTime and LocalDateTime

Step 12 - Java Dates - Exploring LocalDate - Creation and Methods to play with Date

Step 13 - Java Dates - Exploring LocalDate - Comparing Dates and Creating Specific Dates

Step 14 - Java Reference Types - Conclusion

Step 00 - Introduction to Array and ArrayList - Section Introduction with a Challenge

Step 01 - Understanding the need and Basics about an Array

Step 02 - Java Arrays - Creating and Accessing Values - Introduction

Step 03 - Java Arrays - Puzzles - Arrays of Objects, Primitive Data Types, toStr

Step 04 - Java Arrays - Compare, Sort and Fill

Step 05 - Java Arrays - Exercise - Create Student Class - Part 1 - Total and Average

Step 06 - Java Arrays - Exercise - Create Student Class - Part 2 - Max and Min Marks

Step 07 - Introduction to Variable Arguments - Need

Step 08 - Introduction to Variable Arguments - Basics

Step 09 - Introduction to Variable Arguments - Enhancing Student Class

Step 10 - Java Arrays - Using Person Objects and String Elements with Exercises

Step 11 - Java String Arrays - Exercise Solutions - Print Day of Week with Most

Step 12 - Adding and Removing Marks - Problem with Arrays

Step 13 - First Look at ArrayList - An Introduction

Step 14 - First Look at ArrayList - Refactoring Student Class to use ArrayList

Step 15 - First Look at ArrayList - Enhancing Student Class with Add and Remove

Step 16 - Introduction to Array and ArrayList - Conclusion

Step 00 - Object Oriented Programming - Level 2 - Section Introduction

Step 01 - Basics of Designing a Class - Class, Object, State and Behavior

Step 02 - OOPS Example - Fan Class - Deciding State and Constructors

Step 03 - OOPS Example - Fan Class - Deciding Behavior with Methods

Step 04 - OOPS Exercise - Rectangle Class

Step 05 - Understanding Object Composition with Customer Address Example

Step 06 - Understanding Object Composition - An Exercise - Books and Reviews

Step 07 - Understanding Inheritance - Why do we need it?

Step 08 - Object is at top of Inheritance Hierarchy

Step 09 - Inheritance and Overriding - with toString() method

Step 10 - Java Inheritance - Exercise - Student and Employee Classes

Step 11 - Java Inheritance - Default Constructors and super() method call

Step 12 - Java Inheritance - Puzzles - Multiple Inheritance, Reference Variables

Step 13 - Java Abstract Class - Introduction

Step 14 - Java Abstract Class - First Example - Creating Recipes with Template Method

Step 15 - Java Abstract Class - Puzzles

Step 16 - Java Interface - Example 1 - Gaming Console - How to think about Interfaces

Step 17 - Java Interface - Example 2 - Complex Algorithm - API defined by externl

Step 18 - Java Interface - Puzzles - Unimplemented methods, Abstract Classes, Variables

Step 19 - Java Interface vs Abstract Class - A Comparison

Step 20 - Java Interface Flyable and Abstract Class Animal - An Exercise

Step 21 - Polymorphism - An introduction

Step 01 - Java Collections - Section Overview with Need For Collections

Step 02 - List Interface - Introduction - Position is King

Step 03 - List Interface - Immutability and Introduction of Implementations - ArrayList

Step 04 - List Interface Implementations - ArrayList vs LinkedList

Step 05 - List Interface Implementations - ArrayList vs Vector

Step 06 - List Inteface - Methods to add, remove and change elements and lists

Step 07 - List and ArrayList - Iterating around elements

Step 08 - List and ArrayList - Choosing iteration approach for printing and dele

Step 09 - List and ArrayList - Puzzles - Type Safety and Removing Integers

Step 10 - List and ArrayList - Sorting - Introduction to Collections sort static

Step 11 - List and ArrayList - Sorting - Implementing Comparable Interface in Student Class

Step 12 - List and ArrayList - Sorting - Providing Flexibility by implementing Comparator

Step 13 - List and ArrayList - A Summary

Step 14 - Set Interface - Introduction - No Duplication

Step 15 - Understanding Data Structures - Array, LinkedList and Hashing

Step 16 - Understanding Data Structures - Tree - Sorted Order

Step 17 - Set Interface - Hands on - HashSet, LinkedHashSet and TreeSet

Step 18 - Set Interface - Exercise - Find Unique Characters in a List

Step 19 - TreeSet - Methods from NavigableSet - floor,lower,upper, subSet, head

Step 20 - Queue Interface - Process Elements in Order

Step 21 - Introduction to PriorityQueue - Basic Methods and Customized Priority

Step 22 - Map Interface - An Introduction - Key and Value

Step 23 - Map Interface - Implementations - HashMap, HashTable, LinkedHashMap

Step 24 - Map Interface - Basic Operations

Step 25 - Map Interface - Comparison - HashMap vs LinkedHashMap vs TreeMap

Step 26 - Map Interface - Exercise - Count occurances of characters and words

Step 27 - TreeMap - Methods from NavigableMap - floorKey, higherKey, firstEntry,

Step 28 - Java Collections - Conclusion with Three Tips

Step 01 - Introduction to Generics - Why do we need Generics?

Step 02 - Implementing Generics for the Custom List

Step 03 - Extending Custom List with a Generic Return Method

Step 04 - Generics Puzzles - Restrictions with extends and Generic Methods

Step 05 - Generics and WildCards - Upper Bound and Lower Bound

Step 01 - Introduction to Exception Handling - Your Thought Process during Excep

Step 02 - Basics of Exceptions - NullPointerException and StackTrace

Step 03 - Basics of Handling Exceptions - try and catch

Step 04 - Basics of Handling Exceptions - Exception Hierarchy, Matching and Catc

Step 05 - Basics of Handling Exceptions - Need for finally

Step 06 - Basics of Handling Exceptions - Puzzles

Step 07 - Checked Exceptions vs Unchecked Exceptions - An Example

Step 08 - Hierarchy of Errors and Exceptions - Checked and Runtime

Step 09 - Throwing an Exception - Currencies Do Not Match Runtime Exception

Step 10 - Throwing a Checked Exception - Throws in method signature and handling

Step 11 - Throwing a Custom Exception - CurrenciesDoNotMatchException

Step 12 - Write less code with Try with Resources - New Feature in Java 7

Step 13 - Basics of Handling Exceptions - Puzzles 2

Step 14 - Exception Handling - Conclusion with Best Practices

Java Tip 01 - Imports and Static Imports

Java Tip 02 - Blocks

Java Tip 03 - equals method

Java Tip 04 - hashcode method

Java Tip 05 - Class Access Modifiers - public and default

Java Tip 06 - Method Access Modifiers - public, protected, private and default

Java Tip 07 - Final classes and Final methods

Java Tip 08 - Final Variables and Final Arguments

Java Tip 09 - Why do we need static variables?

Java Tip 09 - Why do we need static methods?

Java Tip 10 - Static methods cannot use instance methods or variables

Java Tip 11 - public static final - Constants

Step 01 - Getting Started with Selenium - An Overview

Step 02 - Installing Selenium IDE

Step 03 - Recording and Replaying Google Search with Selenium IDE

Step 04 - Exercise - Recording Facebook Login

Step 05 - Advanced Features in Selenium IDE

Step 06 - Alternative for Selenium IDE - Katalon Studio

Step 07 - Installing and Recording Tests with Katalon Studio

Step 08 - Advanced Features of Katalon Studio

Step 09 - Export Unit Tests and Set up new Maven Project

Step 10 - Adding Maven Dependencies for JUnit, Web Driver Manager and Web Driver

Step 11 - Fixing Driver Error with ChromeDriverManager

Step 12 - Exercise - Run Facebook JUnit Test

Step 13 - Running a Selenium Automation Test - What is happening in Background

Step 14 - Install TestNG Plugin and Create New Project with TestNG

Step 15 - Export and Run TestNG Test for Google and Facebook

Step 16 - Comparing TestNG and JUnit Tests and Course Overview

Step 01 - Introduction to TestNG vs JUnit

Step 02 - Creating a Unit Test for SimpleClass

Step 03 - Adding Asserts to Unit Test

Step 04 - Exercise - Write more unit test Scenarios

Step 05 - Writing Selenium JUnit Automation Test for Google - Part 1

Step 06 - Writing Selenium JUnit Automation Test for Google - Part 2

Step 07 - Exploring WebDriver Interface

Step 08 - Writing Selenium JUnit Automation Test for Google - Part 3

Step 09 - Reducing Duplication with @Before and @After JUnit Annotations

Step 10 - Time for TestNG - Convert Unit Test to TestNG

Step 11 - TestNG Advanced Features - XML Suite and Test Reports

Step 12 - TestNG Advanced Features - Running Tests with Parameters defined in XM

Step 13 - TestNG Advanced Features - Running Tests in Parallel

Step 01 - Why should you learn HTML and CSS

Step 02 - How does Web Work - Request, Response, HTML and Browser

Step 03 - Installing Web Editor - Brackets

Step 04 - First HTML File - Tags, HTML, Head and Body

Step 05 - Basic HTML Tags - Paragraph, Div, Heading - H1 to H6

Step 06 - Formatting Tags - Bold, Italicized and Quotes

Step 07 - Using Tags without closing tag - BR and HR

Step 08 - W3C Standards for HTML

Step 09 - Creating List of elements with UL LI and OL

Step 10 - Organizing Your Data Using Tables

Step 11 - Organizing Your Data Using Tables - Exercise Solutions

Step 12 - HTML Attributes and Links - Absolute and Relative

Step 13 - Image Tag in HTML - Local and Internet Links

Step 14 - Introduction to Live Preview Feature in Brackets

Step 15 - Nesting of Divs and Understanding align Attribute

Step 16 - Getting Data from User using Forms - Text and TextArea

Step 17 - Attributes on Text Elements - Size, maxlength, value

Step 18 - Choosing among multiple options using Radio Buttons

Step 19 - Choosing among multiple options using Select Box

Step 20 - Choosing Yes or No with Check Box

Step 21 - Submitting a Form and Understanding GET and POST

Step 22 - Introduction to Frames

Step 23 - Miscellaneous - Password Fields, File Input and Multi Select Box

Step 24 - Introduction to CSS

Step 25 - CSS for input, select and text area

Step 26 - CSS attributes with color, background color

Step 27 - Grouping Form Elements with fieldset

Step 28 - Styling Fieldsets with CSS

Step 29 - Exercise - Styling Lists

Step 30 - Using an External CSS File

Step 31 - Understanding Class in CSS

Step 32 - Making best use of Class in CSS and Multiple Classes

Step 33 - Using id with CSS

Step 34 - Understanding CSS Selectors and Testing using $$ function

Step 35 - CSS Selectors - Identifying Input Element

Step 36 - Introduction to XPath Expressions - Absolute and Relative

Step 37 - Using id and class in XPath Expressions

Step 38 - Using XPath on the Forms Page

Step 39 - A Review of XPath Expressions and CSS Selectors

Step 01 - Setting up First Web Application

Step 02 - Refactoring Shortcuts To Learn

Step 03 - My Favorite Shortcuts - Ctrl + 1 and Ctrl + Space

Step 01 - Introduction to the Section

Step 02 - Setting up New Project with TestNG

Step 03 01 - Selenium Locators - Locate Elements By Id and WebElement Interface

Step 03 02 - Exercise - Selenium Locators - Locate Elements By Id

Step 04 - Selenium Locators - Locate Elements By Name - Part 1

Step 05 - Selenium Locators - Locate Elements By Name - Part 2

Step 06 - Abstracting @BeforeTest and @AfterTest to common super class AbstractC

Step 07 - Debugging Errors - Element Not Found Exception

Step 08 - Selenium Locators - Locate Elements By Tag Name

Step 09 - Finding Multiple Matching Elements with findElements

Step 10 - Finding Multiple Matching input Elements

Step 11 - Slowing Tests using sleep for visualizing

Step 12 - Automation Test for Entering UserId and Password and Logging in from L

Step 13 - Exercise - Create Automation Test fo Login Static Page

Step 14 - Selenium Locators - Locate Elements By Link Text

Step 15 - Selenium Locators - Locate Elements By Partial Link Text

Step 16 - Selenium Locators - Locate Elements By Class

Step 17 - Exercise - Selenium Locators - Locate Elements By Class

Step 18 - Selenium Locators - Locate Table Element

Step 19 - Exercise - Selenium Locators - Locate and Click Table Element

Step 20 - Understanding CSS Selectors for Table Data - td

Step 21 - Using XPath Expressions to Locate Table Elements

Step 22 - Choosing among multiple Selenium Locator Options

Step 23 - Improving Performance By Caching WebElements

Step 24 - Conclusion

Step 01 - Introduction to Section

Step 02 - Reading and Setting values into Text Elements using Selenium Web Drive

Step 03 - Reading and Setting values into TextArea Elements using Selenium Web D

Step 04 - Reading value of CheckBox in Automation Tests

Step 05 - Setting value of CheckBox in Automation Tests

Step 06 - Creating Framework Utility Method for CheckBox in Automation Tests

Step 07 - Reading value of Radio Button in Automation Tests

Step 08 - Setting value of Radio Button in Automation Tests

Step 09 - Reading value of Select Box

Step 10 - Reading value of Multi Select Box

Step 11 - Setting value of Select Box in Automation Test

Step 12 - Conclusion

Step 01 - Introduction and Setting up New Project with TestNG and Selenium

Step 02 - Reading CSS Styles

Step 03 - Exercise - Reading CSS Styles

Step 04 - Checking if an element is enabled using isEnabled and Exploring WebDri

Step 05 - More methods in WebDriver Interface - getAttribute, getLocation and ge

Step 06 - Accessing Window Information using WebDriver manage window method

Step 07 - Window Navigation in Selenium Automation Test with WebDriver navigate

Step 08 - Automation Testing Modal Windows using Sleep

Step 09 - Automation Testing Modal Windows with Implicit Wait

Step 10 01 - Automation Testing Modal Windows with Explicit Waits

Step 10 02 - Automation Testing Modal Windows with Explicit Waits - Events

Step 11 - Testing Alert Boxes with Selenium

Step 12 - Window Handles and Basics of Testing New Browser Window Launch

Step 13 - Finding the Handle of Newly Launched Window

Step 14 - Switching to Newly Launched Window

Step 15 - Writing Automation Tests for Frames

Step 16 - Taking Screenshot during Automation Test

Step 17 - Executing JavaScript Code in Selenium Test

Step 18 - Reviewing WebDriver Interface

Step 20 - Writing Automation Tests for Tables

Step 21 - Designing a basic framework for Tables

Step 22 - Using Actions Interface for Basic Actions with Keyboard and Mouse

Step 23 - More Actions Interface - Drag, Drop, Hold and Release

Step 01 - Introduction to Cross Browser Automation Testing

Step 02 - Setting up a New Project and Running Tests in Chrome and Firefox

Step 03 - Running Automation Tests in Other Browser - Safari, Internet Explorer

Step 04 - Running Headless Automation Test with PhanthomJS

Step 05 - Running Automation Tests with Chrome and Firefox Browsers in Headless

Step 06 - Designing Cross Browser Automation Test Framework - Part 1

Step 07 - Designing Cross Browser Automation Test Framework - Part 2

Step 01 - Section Overview

Step 02 - Understanding Prerequisites and Login Test Scenario

Step 03 - Setting up a new Project with Hardcoded Login Scenario

Step 04 - Writing Automation Test for Unsuccessful Login

Step 05 - Data Driving Unsuccessful Login Automation Test with DataProvider

Step 06 - Adding Passwords to DataProvider

Step 07 - Adding Expected Test Result to Data Provider

Step 08 - Reading Test Data From CSV File

Step 09 - Connecting Test Data Provider to CSV File

Step 10 - Setting up Excel File with Google Spreadsheets

Step 11 - Reading Test Data From Excel using POI and ExcelReadUtil

Step 12 - Understanding ExcelReadUtil

Step 13 - Connecting Test Data Provider to Excel File

Step 01 - Introduction - Objectives and Prerequisites

Step 02 - Setting up a New Project and Creating an outline for the Update Todo T

Step 03 - Writing First Version of Update Todo Automation Test

Step 04 - First Working Version of Update todo & a Discussion on Maintainability

Step 05 - Introduction to Page Object Model

Step 06 - Creating Your first Page Object

Step 07 - Updating the Automation Test to use Login Page Object

Step 08 - Creating Action Methods in Login Page Object

Step 09 - Creating Todo Page Object

Step 10 - Creating List Todo Page Object

Step 01 - Selenium Standalone and Grid - An Introduction

Step 02 - Installation Step I - NPM using Node JS

Step 03 - Installation Steps II and III - Installing and Launching Selenium Stand

Step 04 - Setting up an Automation Project and Creating a Simple Test

Step 05 - Creating a New Test to run using Selenium Standalone Server

Step 06 - Introduction to Selenium Grid - Hub and Nodes

Step 07 - Setting up Selenium Grid with a Hub and 2 Nodes

Step 08 - Setting up different browser capabilities for the Nodes

Introduction To Maven In 5 Steps

Step 01 - Creating And Importing A Maven Project

Step 02 - Understanding Project Object Model

Step 03 - Maven Build Life Cycle

Step 04 - How Does Maven Work?

Step05-ImportantMavenCommands