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Index
Learn to Program with Scratch: A Visual Introduction to Programming with Games, Art, Science, and Math  
About the Author About the Technical Reviewer
Acknowledgments Introduction
Whom This Book Is For A Note to the Reader Features Organization of This Text Conventions Used Online Resources Errata and Updates
1. Getting Started
What Is Scratch? Scratch Programming Environment
The Stage Sprite List Blocks Tab Scripts Area Costumes Tab Sounds Tab Backdrops Tab Sprite Info Toolbar
Paint Editor
Setting the Center of an Image Setting Transparent Color
Your First Scratch Game
Step 1: Prepare the Backdrop Step 2: Add the Paddle and Ball Step 3: Start the Game and Get Your Sprites Moving Step 4: Spice It Up with Sound
Scratch Blocks: An Overview Arithmetic Operators and Functions
Arithmetic Operators Random Numbers Mathematical Functions
Summary Problems
2. Motion and Drawing
Using Motion Commands
Absolute Motion Relative Motion Other Motion Commands
Pen Commands and Easy Draw The Power of Repeat
Rotated Squares Exploring with Stamp
Scratch Projects
Get the Money Catching Apples
More on Cloned Sprites Summary Problems
3. Looks and Sound
The Looks Palette
Changing Costumes to Animate Sprites That Speak and Think Image Effects Size and Visibility Layers
The Sound Palette
Playing Audio Files Playing Drums and Other Sounds Composing Music Controlling Sound Volume Setting the Tempo
Scratch Projects
Dancing on Stage Fireworks
Summary Problems
4. Procedures
Message Broadcasting and Receiving
Sending and Receiving Broadcasts Message Broadcasting to Coordinate Multiple Sprites
Creating Large Programs in Small Steps
Creating Procedures with Message Broadcasting Building Your Own Block Passing Parameters to Custom Blocks Using Nested Procedures
Working with Procedures
Breaking Programs Down into Procedures Building Up with Procedures
Summary
Problems
5. Variables
Data Types in Scratch
What’s in the Shape? Automatic Data Type Conversion
Introduction to Variables
What Is a Variable? Creating and Using Variables The Scope of Variables Changing Variables
Spider Web Pinwheel
Variables in Clones
Displaying Variable Monitors Using Variable Monitors in Applications
Simulating Ohm’s Law Demonstrating a Series Circuit Visualizing a Sphere’s Volume and Surface Area Drawing an n-Leaved Rose Modeling Sunflower Seed Distribution
Getting Input from Users
Reading a Number Reading Characters Performing Arithmetic Operations
Summary Problems
6. Making Decisions
Comparison Operators
Evaluating Boolean Expressions Comparing Letters and Strings
Decision Structures
The if Block Using Variables as Flags The if/else Block Nested if and if/else Blocks Menu-Driven Programs
Logical Operators
The and Operator The or Operator The not Operator Using Logical Operators to Check Numeric Ranges
Scratch Projects
Guess My Coordinates Triangle Classification Game Line Follower Equation of a Line Other Applications
Summary Problems
7. Repetition: A Deeper Exploration of Loops
More Loop Blocks in Scratch
The repeat until Block Building a forever if Block
Stop Commands
Ending a Computational Loop Validating User Input
Counters
Check a Password Counting by a Constant Amount
Revisiting Nested Loops Recursion: Procedures that Call Themselves Scratch Projects
Analog Clock Bird Shooter Game Free-Fall Simulation Projectile Motion Simulator Other Applications
Summary Problems
8. String Processing
Revisiting the String Data Type
Counting Special Characters in a String Comparing String Characters
String Manipulation Examples
Igpay Atinlay Fix My Spelling Unscramble
Scratch Projects
Shoot Binary to Decimal Converter Hangman Fraction Tutor
Summary Problems
9. Lists
Lists in Scratch
Creating Lists List Commands
Add and Delete Insert and Replace Accessing List Elements The Contains Block
Bounds Checking
Dynamic Lists
Filling Lists with User Input Creating a Bar Chart
Numerical Lists
Finding Min and Max Finding the Average
Searching and Sorting Lists
Linear Search Frequency of Occurrence Bubble Sort Finding the Median
Scratch Projects
The Poet Quadrilateral Classification Game Math Wizard Flower Anatomy Quiz Other Applications
Summary Problems
A. Sharing and Collaboration
Creating a Scratch Account Using the Backpack Creating Your Own Project
Starting a New Project Remixing a Project The Project Page Sharing Your Project
About the Online Resources Updates Index About the Author Copyright
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