KTurtle/C2/Introduction-to-KTurtle/English

“repeat” command Slide number 13

Visual Cue	Narration
Slide Number 1	Hello everybody. Welcome to this tutorial on Introduction to KTurtle. In this tutorial I will introduce you to the basics of getting started with KTurtle.
Slide number2 Learning objectives	In this tutorial, we will learn about KTurtle Window Editor Canvas Menu Bar Toolbar We will also learn about, Moving the Turtle Drawing lines and changing directions Draw a triangle
Slide Number 3 System Requirement	To record this tutorial I am using Ubuntu Linux OS version. 12.04. KTurtle version. 0.8.1 beta.
Slide Number 4 What is KTurtle?	What is KTurtle? KTurtle is a free tool to learn basic programming. It is useful for computer aided interactive learning KTurtle is available for download at http://edu.kde.org/kturtle/
Slide Number 5 Utilities of KTurtle	KTurtle Makes programming easy and accessible . Helps teach kids basics of mathematics. Translates commands to speaking language of the programmer Translates commands into visuals.
Slide Number 6 Install KTurtle	* We can install KTurtle using Synaptic Package Manager . for more information on Synaptic Package Manager please refer to Ubuntu Linux tutorials on our website http://spoken-tutorial.org
Switch to KTurtle Application Dash home >>In the Search bar type KTurtle Click on the KTurtle icon.	Let's open a new KTurtle Application. Click on Dash home. In the Search bar, type KTurtle. And Click on the KTurtle icon.
Switch to KTurtle Application Move the mouse over the window	A typical KTurtle window looks like this. This is the menubar. In the menu bar on the top, You will find menu items File, Edit, Canvas, Run, Tools, Settings and help options
Tool bar	In the tool bar, you can reach for most of the actions used.
Editor	Editor is on the left, where you can type the TurtleScript commands. Most of the functions of the editor can be found in the File and Edit menus.
How to write code in the editor	There are several ways to enter the code in the editor. Easiest way is to use an example. Go to File menu > select anti-clockwise Here I will select a flower Code of the selected example opens in the editor. Click on Run button from menu bar or tool bar to run the code. Another way is to directly type your own code in the editor or copy/paste some code in the editor for example: from other KTurtle files
Show the Canvas	Canvas is on the right, where Turtle makes your drawings. Turtle draws accordingly to the commands it gets from the editor on the canvas
Run options.	Run option on the tool bar starts execution of the commands in the editor. It presents a list of execution speeds. Full speed(No highlighting and inspector), Full speed, slow, slower, slowest and step-by-Step Abort and pause options allow you to stop and pause the executions respectively.
	Let's now Run this code . Turtle draws a flower on the canvas.
Show position of Turtle	When you open a new KTurtle application. Turtle is in the middle of the canvas by default. Let's now move the Turtle. Turtle can do three types of moves: it can move forwards. it can move backwards it can turn left or right. it can also jump directly to a position on the screen.
Zoom text	Let me zoom into the program text it may possibly be a little blurred.
Type the code in the editor reset go 200,200 forward 100 turnleft 120 forward 100 turnleft 120 forward 100 turnleft 120	Let us go through a simple example. In your editor, type the following commands: reset forward 100 turnright 120 forward 100 turnright 120 forward 100 turnright 120
Highlighting	Note that the color of the code changes as we type . This feature is called the highlighting. Different types of commands are highlighted differently, which makes it easier to read large blocks of code.
	I will explain the code now.
Explanation of code	reset command sets Turtle to default position. forward 100 commands Turtle to move forward by 100 pixels. turnright 120 commands Turtle to turn, 120 degrees anti-clockwise. Note that these two commands are repeated thrice to draw a triangle.
Run the code	Let's now execute the code. I will choose Slow step so that we understand what commands are being executed. Here the triangle is drawn.
Let's look at another example and also learn how to beautify our canvas. Let's draw a triangle using repeat command. I will clear the current program.
Zoom text	Let me zoom into the program text to have a clear view.
reset canvassize 200,200 canvascolor 0,255,0 pencolor 0,0,255 penwidth 2 repeat 3 { forward 100 turnleft 120 }	Type the following commands into your editor: reset canvassize space 200,200 canvascolor space 0,255,0 pencolor space 0,0,255 penwidth space 2 repeat space 3 within curly braces { forward 100 turnleft 120 }
	Let me now explain the code.
Highlight reset	reset command sets Turtle to its default position.
Highlight canvassize 200,200	canvassize 200,200 sets the canvas width and height to 200 pixels.
Highlight canvascolor 0,255,0	canvascolor 0,255,0 makes the canvas green. 0,255,0 is a RGB Combination where only green value is set to 255 and the others are set to 0. This makes the canvas in green color.
Highlight pencolor 0,0,255	pencolor 0,0,255 sets the color of pen to blue RGB combination where blue value is set to 255.
Highlight penwidth 2	penwidth 2 sets the width of the pen to 2 pixels.
Highlight repeat	repeat command is followed by a number and a list of commands within curly brackets. This repeats the commands within the curly brackets the specified number of times.
Highlight forward 100 and turnleft 120	Here the commands forward 100 and turnleft 120 are within curly brackets. repeat command is followed by the number 3, because a triangle has 3 sides. These commands are run 3 times in a loop. 3 sides of the triangle are drawn.
Run the program	Let's now Run the code now I will select slow option for execution of the program. The canvas color becomes green and the Turtle draws a triangle.
Save file	Let's now save the file. Select File menu > Save As . Save As dilog box opens. I will select Documents folder for saving the file. I will type the file name as triangle and click on Save button. Notice that the name of the file appears in the top panel and it is saved as a dot turtle file lilke all Turtle files.
	With this we come to the end of this tutorial. Let's summarize.
Slide Number Summary	In this tutorial, we have learnt about, KTurtle's editor, canvas, menubar and toolbar Move Turtle Draw lines and change directions Draw a triangle
Switch to Slide 5 Assignment	ASSIGNMENT As an assignment I would like you to draw a square. by using the commands. forward, backward, turnleft, turnright and repeat Set background color, penwidth and pencolor of your choice Change values in the RGB combination
Slide number 11 Acknowledgement	Watch the video available at this URL http://spoken-tutorial.org/What is a Spoken Tutorial It summarises the Spoken Tutorial project If you do not have good bandwidth, you can download and watch it
Slide Number 12	The Spoken Tutorial Project Team : Conducts workshops using spoken tutorials Gives certificates to those who pass an online test For more details, please write to contact@spoken-tutorial.org
Spoken Tutorial Project is a part of the Talk to a Teacher project It is supported by the National Mission on Education through ICT, MHRD, Government of India More information on this Mission is available at this link http://spoken-tutorial.org/NMEICT-Intro ] The script is contributed by IT for Change Bangaluru. This is Madhuri Ganpathi from IIT Bombay signing off. Thank you for joining.

Contributors and Content Editors

Chandrika, Madhurig