KTurtle/C3/Programming-Concepts/English

Visual Cue	Narration
Slide Number 1	Hello Everybody. Welcome to this tutorial on Programming concepts in KTurtle.
Slide Number 2 Learning Objectives	In this tutorial, we will learn how to Write a program in KTurtle Use variables to store user input Use print command to print on canvas Comment a line
Slide Number 3 System Requirement	To record this tutorial, I am using, Ubuntu Linux OS Version 11.10. KTurtle version 0.8.1 beta.
Slide number 4 Pre-requisites	We assume that you have basic working knowledge of KTurtle. If not, for relevant tutorials, please visit our website, http://spoken-tutorial.org.
	Before proceeding, we will discuss some basic information about KTurtle.
Slide Number 5 Sprite	Turtle displayed on the canvas is called sprite. Sprite is a small image that moves around the screen. e.g. Cursor is a sprite.
Slide Number 6 sprite Commands	Spritehide command hides Turtle from canvas. Spriteshow command shows Turtle if it is hidden. Clear command cleans all drawings from canvas.
Slide Number 7 Symbols	In KTurtle, $ sign is a container of variables. (asterisk) is used for multiplication of two numbers. ^(caret) raises the power of a number. (hash) sign comments a line written after it. sqrt is an inbuilt function to find square root of a number.
Switch to Kturtle Application Dash home >>Media Apps>>Under Type >>Education>>KTurtle	Let's open new KTurtle Application Click on Dash home >> Media Apps. Under Type, Choose Education and KTurtle. KTurtle application opens.
Press CTRL+ALT+T >> open the terminal >>type kturtle >>press enter to open	We can also open KTurtle Application from the terminal. Press CTRL+ALT+T simultaneously to open the terminal. Type KTurtle and press enter, KTurtle Application opens.
	Let me type and explain the program code.
	Let me zoom the program text, it may possibly be a little blurred.
#program to find square of a number Highlight #	#program to find square of a number. Press enter "#" sign comments a line written after it. This means, this line will not be executed while running the program. Press enter.
reset Highlight reset	reset reset command sets Turtle to default position. Press enter.
$i= ask "enter any number for i and click OK" Highlight $i	$i= ask within double quotes enter any number for i and click OK. $i is a variable to store user input.
Highlight ask	“ask” command asks for user input to be stored in variable press enter
fontsize 28 Highlight fontsize 28	“fontsize” space 28 press enter. fontsize 28 sets the font size used by print. Fontsize takes number as input, set in pixels.
print $i*$i Highlight print $i*$i	print $i*$i print $i*$i calculates and prints square of a number. press enter.
spritehide Highlight spritehide	spritehide spritehide hides Turtle from canvas.
Run the program code	Let us Run the program now. Click on Run button on the toolbar to start execution of the code in the editor. It shows a list of execution speeds. Full speed(no highlighting and inspector) Full speed, slow, slower, slowest and step-by-step.
Enter '15' for i Square of 15 =225	Let me run the code at slow speed. An input bar appears let's enter 15 for i and click OK square of '15' = '225' is displayed on the canvas.
Let's now learn to find nth power of a number through a program.	I already have program in a text editor.
#Program evaluates nth power of a number reset $i= ask "enter number for i and click OK" $n=ask "enter number for n and click OK" fontsize 28 print ($i^$n) spritehide	Let me copy the code from editor and paste it into KTurtle editor. Please pause the tutorial here and copy the program into your KTurtle editor.

Contributors and Content Editors

Madhurig