KTurtle/C3/Control-Execution/English

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 ] This is Madhuri Ganpathi from IIT Bombay signing off Thank you for joiningSlide number 13 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.orgSlide Number 13 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 11 AcknowledgementAs an assignment I would like you to write programs to evaluate Multiples of 2 using “while” loop Multiplication table of a number using “for” loopSlide Number 12 AssignmentLet us summarize. In this tutorial we have learnt to use, “while” loop and “for” loopSlide Number 11 SummaryWith this we come to end of this tutorial. Let me click the “ Run” button to run the program. A series of sum of first 15 numbers and sum of first 15 natural numbers is displayed on the canvas. Turtle moves 15 steps forward.Run the program“print” command displays the “string” within double quotes and also displays variable $r.print "Sum of first 15 natural numbers ="+$r“Turtle” displays all print commands without any time gap. “Wait 2” command makes Turtle to “wait” for 2 seconds before executing next command.Highlight wait 2go 10,250 commands Turtle to go 10 pixels from left of canvas and 250 pixels from top of canvas.Highlight go 10,250forward 15 moves Turtle 15 steps foward.Highlight forward 15print $r displays the variable r.Highlight print $rfontsize 18 sets the font size used by print command. Highlight fontsize 18$r=$x*($x+1)/2 calculates the value of variable r.Highlight $r=$x*($x+1)/2for $x= 1 to 15 checks “for” condition from 1 to 15.Highlight for $x= 1 to 15$r=0 initialises the value of variable r to zero.Highlight $r=0reset command sets “Turtle” to default position.Highlight reset# sign comments a line written after it.Highlight #Let me explain the code.Let me zoom into the program text it may possibly be a little blurred.Let me copy the program and paste it into KTurtle editor Please pause the tutorial here and type the program into your KTurtle editor. Please resume the turtorial after typing the program.#program print to sum of first 15 natural numbers reset $r=0 for $x= 1 to 15{ $r=$x*($x+1)/2 fontsize 18 print $r forward 15 } go 10,250 wait 2 print "Sum of first 15 natural numbers ="+$rLet me clear the current program. Let me type clear command and run to clean the canvas.Clear the editor and canvasLet me explain the structure of “for” loop. for variable = start number to end number { Statement}Slide Number 10 Syntax of “for” loop“for” loop is a counting loop. Every time the code inside “for” loop is executed, variable value is incremented, till it reaches the end value.Slide Number 9Let's next work with “for” loopMultiples of 3 from 3 to 30 are displayed on the canvas. “Turtle” moves 20 steps forward on the canvas. Run the programLet me click on the “Run” button to run the program. A message dialog box pops up. Let me click OK.Run the programprint $x displays the value of variable x on the canvas.Highlight print $x forward 20 commands “Turtle” to move 20 steps forward on the canvas.Highlight forward 20 fontsize 15 sets the font size used by print command. Fontsize takes number as input, set in pixels.Highlight fontsize 15$x=$x+3 increments the value of variable $x by 3Highlight $x=$x+3while $x<30 checks the “while” condition. Highlight while $x<30Message in a program is given within double quotes after the keyword message " " “message” command takes “string” as input. It shows a pop-up dialog box containing text from the string. Highlight message" "$x=0 initialises the value of variable x to zero.Highlight $xreset command sets “Turtle” to its default position.Highlight reset# sign comments a line written after it. It means, this line will not be executed while running the program.Highlight #Let me explain the code.Let me zoom into the program text it may possibly be a little blurred.Let me copy the program from text editor and paste it into KTurtle editor Please pause the tutorial here and type the program into your KTurtle editor. Please resume the turtorial after typing the program#program to print a series of multiples 3 upto 30 reset $x=0 message"In while loop, code inside the loop repeats till boolean evaluates false" while $x<30 { $x=$x+3 fontsize 15 forward 20 print $x } I already have the code in a text editor.Let me explain the structure of “while” loop. while loop condition { do something with loop increment variable }Slide Number 8 Syntax of “while” loopIn the “while” loop, the code inside the loop repeats till boolean evaluates to 'false'. Slide Number 7Let's begin the tutorial with “while” loopLoop is a block of code is executed repeatedly untill a certain condition is satisfied. Eg. “while” loop and “for” loopSlide Number 6 LoopControl execution is controlling the flow of a program. Different conditions are used to control program execution.Slide Number 5 Control executionLet me first explain about what is control execution.Let's open a new KTurtle Application. Click on Dash home. The Search bar appears. In the Search bar, type KTurtle. Click on the option. KTurtle Application opens.Switch to KTurtle Application Dash home >>Search bar appears>> In the Search bar type KTurtleWe assume that you have basic working knowledge of Kturtle. If not, for relevant tutorials, please visit our website. http://spoken-tutorial.orgSlide Number 4 Pre-requisitesTo record this tutorial I am using, Ubuntu Linux OS Version 12.04 KTurtle version 0.8.1 beta. Slide Number 3 System Requirement

Visual Cue	Narration
Slide Number 1	Hello everybody. Hello Everybody. Welcome to this tutorial on Control Execution in KTurtle
Slide Number 2 Learning Objectives	In this tutorial, we will learn 'while' loop and 'for' loop

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Madhurig