KTurtle/C3/Programming-Concepts/English-timed
From Script | Spoken-Tutorial
| Time | Narration |
| 00:01 | Hello Everybody. |
| 00:03 | Welcome to this tutorial on Programming concepts in KTurtle. |
| 00:08 | In this tutorial, we will learn how to: |
| 00:12 | Write a program in 'KTurtle' |
| 00:15 | Use variables to store user input |
| 00:18 | Use "print" command to print on canvas |
| 00:22 | Comment a line. |
| 00:24 | To record this tutorial, I am using:
Ubuntu Linux OS Version 11.10 KTurtle version 0.8.1 beta. |
| 00:37 | We assume that you have basic working knowledge of KTurtle. |
| 00:43 | If not, for relevant tutorials, please visit our website: |
| 00:49 | Before proceeding, we will discuss some basic information about KTurtle. |
| 00:55 | Turtle displayed on the canvas is called "sprite". |
| 01:00 | "Sprite" is a small image that moves around the screen. e.g. cursor is a sprite. |
| 01:10 | "spritehide" command hides Turtle from canvas. |
| 01:15 | "spriteshow" command shows Turtle, if it is hidden. |
| 01:21 | "clear" command cleans all drawings from canvas. |
| 01:27 | In KTurtle, |
| 01:29 | "$" (Doller) sign is a container of variables. |
| 01:34 | "*" (asterisk) is used for multiplication of two numbers. |
| 01:41 | "^" (caret) raises a power of the number. |
| 01:45 | "#" (hash) sign comments a line written after it. |
| 01:50 | "sqrt" is an inbuilt function to find square root of a number. |
| 01:58 | Let's open new KTurtle Application. |
| 02:02 | Click on Dash home >> Media Apps. |
| 02:07 | Under Type, choose Education and KTurtle. |
| 02:13 | KTurtle application opens. |
| 02:20 | We can also open KTurtle using terminal. |
| 02:24 | Press Ctrl+Alt+T keys simultaneously to open the terminal. |
| 02:30 | Type kturtle and press Enter. 'KTurtle' Application opens. |
| 02:41 | Let me type and explain the program code. |
| 02:46 | Let me zoom into the program text, it may possibly be a little blurred. |
| 02:55 | #program to find square of a number. Press Enter. |
| 03:15 | "#" sign comments a line written after it. |
| 03:19 | This means, this line will not be executed while running the program. Press Enter. |
| 03:29 | reset,reset command sets Turtle to default position. Press Enter. |
| 03:38 | $i= ask within double quotes "enter a number for i and click OK". |
| 03:58 | "$i" is a variable to store user input. |
| 04:03 | “ask” command asks for user input to be stored in variable. Press Enter. |
| 04:11 | “fontsize” space 28. |
| 04:17 | fontsize sets the font-size used by print. |
| 04:20 | fontsize takes number as input, set in pixels. |
| 04:27 | print $i*$i |
| 04:36 | print $i*$i calculates and prints square of a number. press Enter. |
| 04:45 | spritehide |
| 04:48 | spritehide hides Turtle from canvas. |
| 04:53 | Let us run the program now. |
| 04:56 | Click on the Run button on the toolbar to start execution of the code in the editor. |
| 05:03 | It shows a list of execution speeds. |
| 05:07 | Full speed (no highlighting and inspector) |
| 05:10 | Full speed,
slow, slower, slowest and step-by-step. |
| 05:17 | Let me run the code at Slow speed. |
| 05:21 | An input bar appears. |
| 05:23 | Let's enter 15 for 'i' and click OK. |
| 05:29 | Square of 15 = 225 is displayed on the canvas. |
| 05:35 | Let's now learn to find nth power of a number through a program. |
| 05:42 | I already have program in a text-editor. |
| 05:46 | Let me copy the program from text editor and paste it into KTurtle editor. |
| 05:56 | Please pause the tutorial here and copy the program into your KTurtle editor. |
| 06:03 | Let me zoom into the program text. |
| 06:07 | Explain the program. |
| 06:09 | # sign comments a line written after it. |
| 06:13 | reset command sets Turtle to default position. |
| 06:18 | $i and $n are variables to store user input. |
| 06:25 | “ask” command asks for user input to be stored in variables. |
| 06:31 | fontsize 28 sets the font-size used by print. |
| 06:37 | fontsize takes number as input, sets in pixels. |
| 06:43 | print ($i^$n) calculates & prints nth power of a number ($i). |
| 06:52 | spritehide hides Turtle from canvas. |
| 06:57 | Let's run the program. |
| 07:00 | Let's enter 5 for 'i' and click OK |
| 07:05 | Let's enter 4 for 'n' and click OK. 5^4=625 is displayed on the canvas. |
| 07:18 | Next, let's use inbuilt “sqrt” function in a program to find square root of a number. |
| 07:27 | Let me copy the code from text-editor and paste it into KTurtle's editor. |
| 07:35 | Please pause the tutorial here and copy the program into your KTurtle editor. |
| 07:43 | Let me zoom the program text, it may possibly be a little blurred. |
| 07:49 | Let me explain the code now. |
| 07:52 | '#' hyash sign comments a line written after it. |
| 07:57 | reset command sets Turtle to default position. |
| 08:02 | $i is a variable to store user input. |
| 08:07 | fontsize 28 sets the font-size used by print. |
| 08:12 | print sqrt $i prints square root of a number. |
| 08:19 | spritehide hides Turtle from canvas. |
| 08:24 | Let me run the program now. |
| 08:28 | Let's enter 169 for 'i' and click OK. |
| 08:34 | Square root of 169 = 13 is displayed on canvas. |
| 08:39 | Let's run again. |
| 08:42 | Let's enter -169 for 'i' and click OK. |
| 08:49 | If we enter a negative number, output is "nan". It means "not a number" |
| 08:56 | as square root of a negative number is not a real number. |
| 09:02 | Let's next evaluate cube-root of a positive number through a program. |
| 09:08 | Let me copy the program from text-editor and paste it into KTurtle's editor. |
| 09:19 | Please pause the tutorial here and copy the program into your KTurtle editor. |
| 09:25 | Let me zoom into the program text, it may possibly be a little blurred. |
| 09:31 | Let me explain the program. |
| 09:35 | '#' hyash sign comments a line written after it. |
| 09:38 | Please note, this is a single line comment. |
| 09:42 | Every comment must be preceded by a '#' sign. |
| 09:48 | reset command sets the Turtle to default position. |
| 09:53 | $i and $C are variables to store user input. |
| 09:59 | $C=($i)^(1/3), calculates cube-root of a number. |
| 10:07 | fontsize 28 sets the font-size used by print. |
| 10:13 | print $C prints cube-root of a number. |
| 10:19 | spritehide hides Turtle from canvas. |
| 10:23 | Let's run the program. |
| 10:27 | Let's enter 343 for 'i' and click OK. |
| 10:34 | Cube root of 343 = 7 is displayed on the canvas. |
| 10:40 | With this, we come to the end of this tutorial. |
| 10:43 | Let us summarize. |
| 10:46 | In this tutorial, we have learnt: |
| 10:49 | Programming concepts |
| 10:52 | Use of "sqrt" function |
| 10:55 | Use of "print" command |
| 10:57 | Using KTurtle editor and canvas. |
| 11:02 | As an assignment, I would like you to use basic programming commands to find: |
| 11:08 | Cube of a number |
| 11:11 | nth root of a number. |
| 11:15 | Watch the video available at this URL: |
| 11:19 | It summarizes the Spoken Tutorial project. |
| 11:22 | If you do not have good bandwidth, you can download and watch it. |
| 11:27 | The Spoken Tutorial Project team: |
| 11:29 | Conducts workshops using spoken tutorials. |
| 11:32 | Gives certificates to those who pass an online test. |
| 11:35 | For more details, please write to:
contact@spoken-tutorial.org |
| 11:44 | Spoken Tutorial project is a part of the Talk to a Teacher project. |
| 11:48 | It is supported by the National Mission on Education through ICT, MHRD, Government of India. |
| 11:55 | More information on this mission is available at this link: |
| 11:59 | This is Madhuri Ganpathi from IIT Bombay, signing off. Thank you for joining. |
Contributors and Content Editors
Kaushik Datta, Madhurig, PoojaMoolya, Pratik kamble, Sandhya.np14, Sneha
