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The KTurtle Handbook

Cies Breijs

Anne-Marie Mahfouf

Mauricio Piacentini

Revision Applications 20.12 (2021-01-20)

Copyright © 2004, 2009 Cies Breijs

Copyright © 2004, 2007 Anne-Marie Mahfouf

Copyright © 2007 Mauricio Piacentini

KTurtle is an educational programming environment that aims to make learning how to program as easy as possible. To achieve this KTurtle makes all programming tools available from the user interface. The programming language used is TurtleScript which allows its commands to be translated.

Table of Contents

1. Introduction
What is TurtleScript?
Features of KTurtle
2. Using KTurtle
The Editor
The Canvas
The Inspector
The Toolbar
The Menubar
The File Menu
The Edit Menu
The Canvas Menu
The Run Menu
The Tools Menu
The Settings Menu
The Help Menu
The Statusbar
3. Getting Started
First steps with TurtleScript: meet the Turtle!
The Turtle Moves
More examples
4. TurtleScript Programming Reference
The Grammar of TurtleScript
Comments
Commands
Numbers
Strings
Boolean (true/false) values
Mathematical, boolean and comparing operators
Mathematical operators
Boolean (true/false) operators
Comparing operators
Commands
Moving the turtle
Where is the turtle?
The turtle has a pen
Commands to control the canvas
Commands to clean up
The turtle is a sprite
Can the turtle write?
Mathematical commands
Input and feedback through dialogs
Assignment of variables
Controlling execution
Have the turtle wait
Execute “if”
If not, in other words: “else”
The “while” loop
The “repeat” loop
The “for” loop, a counting loop
Leave a loop
Stop executing your program
Checking assertions at runtime
Create your own commands with “learn”
5. Glossary
6. Translator's Guide to KTurtle
7. Credits and License
Command Index

List of Tables

4.1. Types of questions
5.1. Different types of code and their highlight color
5.2. Often used RGB combinations