User:10.209.4.2
From Script | Spoken-Tutorial
| Visual Cue | Narration |
|---|---|
| 00.01 | Hello everybody. |
| 00.02 | Welcome to this tutorial on Grammar of TurtleScript in KTurtle. |
| 00.08 | In this tutorial, we will learn about |
| 00.11 | Grammar of Turtle script and 'if'-'else' condition |
| 00.16 | To record this tutorial I am using, Ubuntu Linux OS version. 12.04. KTurtle version. 0.8.1 beta. |
| 00.29 | We assume that you have basic working knowledge of KTurtle |
| 00.35 | If not, for relevant tutorials, please visit our website. http://spoken-tutorial.org |
| 00.40 | Let's open a new KTurtle Application. |
| 00.43 | Click on Dash home. |
| 00.45 | In the Search bar, type KTurtle. |
| 00.49 | Click on the KTurtle icon. |
| 00.52 | We can also open KTurtle using Terminal. |
| 00.56 | Press CTRL+ALT+T simultaneously to open the Terminal. |
| 01.01 | Type KTurtle and press enter to open the KTurtle Application. |
| 01.08 | Let's first look at TurtleScript |
| 01.11 | TurtleScript is a programming language |
| 01.15 | It has different types of words and symbols used for various purposes |
| 01.21 | It instructs Turtle what to do |
| 01.25 | Grammar of TurtleScript in KTurtle includes- |
| 01.30 | Comments |
| 01.31 | Commands |
| 01.32 | Numbers |
| 01.33 | Strings |
| 01.34 | Variables and |
| 01.36 | Boolean values |
| 01.38 | Now we will see where to store numbers |
| 01.42 | Numbers can be stored in |
| 01.44 | Mathematical operators |
| 01.46 | Comparison operators and |
| 01.49 | Variables |
| 01.50 | I will zoom the program text for clear view. |
| 01.54 | First let's look at variables. |
| 01.57 | Variables are words that start with ‘$’ sign, for example $a. |
| 02.04 | In the editor they are highlighted in purple color. |
| 02.09 | Using the assignment, equal to (=), a variable is given its content. |
| 02.14 | Variables can contain numbers $a=100. |
| 02.20 | strings $a=hello or |
| 02.25 | boolean values that is true or false $a=true |
| 02.32 | Variable keeps the content until program finishes execution or until it is reassigned to something else. |
| 02.41 | For example, consider the code. |
| 02.44 | Let us type,$a = 2004 |
| 02.50 | $b = 25 |
| 02.55 | print $a + $b |
| 03.01 | Variable 'a' is assigned a value 2004. |
| 03.06 | Variable 'b' is assigned a value 25 |
| 03.10 | print command, commands Turtle to write something on the canvas. |
| 03.15 | print command, takes numbers and strings as input. |
| 03.19 | print $a + $b commands Turtle to add two values and display them on the canvas. |
| 03.29 | Let's Run the code in slow speed. |
| 03.34 | Value 2029 is displayed on the canvas |
| 03.40 | Let us next see the Mathematical Operators. |
| 03.44 | Mathematical operators include,
|
| 03.53 | I will clear the current code from editor and type clear command and RUN to clean the canvas |
| 04.01 | I already have a program in a text editor. |
| 04.05 | I will Explain the code now |
| 04.08 | “reset” command sets Turtle to its default position |
| 04.12 | canvassize 200,200 fixes the width and height of the canvas to 200 pixels each. |
| 04.22 | value 1+1 is assigned to the variable $add, |
| 04.26 | Value 20-5 is assigned to variable $subtract, |
| 04.31 | value 15 * 2 is be assigned to the variable $multiply. |
| 04.36 | 30/30 is assigned to the variable $divide. |
| 04.40 | go 10,10 commands to Turtle to go 10 pixels left of canvas and 10 pixels from top of canvas |
| 04.52 | print command displays the varible on the canvas |
| 04.56 | I will copy the code from text editor and paste it into KTurtle editor. |
| 05.03 | Pause the tutorial and type the program into KTurtle editor. |
| 05.08 | Resume the tutorial after typing the program |
| 05.13 | Let us click on Run button to run the program |
| 05.17 | Command which is getting executed is highlighted on the editor. |
| 05.22 | Turtle displays the values on the canvas at the specified positions. |
| 05.34 | Let us consider a simple example for using comparison operator .
|
| 05.41 | I will clear the current code from editor and type clear command and RUN to clean the canvas |
| 05.49 | I will zoom the progrm text to have clear view |
| 05.53 | Let's type |
| 05.55 | $answer = 10 > 3 |
| 06.03 | print $answer |
| 06.09 | Here 10 is compared to 3 with the ’greater than’ operator. |
| 06.14 | The result of this comparison, the boolean value true is stored in the |
| 06.19 | variable $answer and the value true is displayed on the canvas. |
| 06.27 | Let's run the code now |
| 06.29 | Turtle displays Boolean value true on the canvas. |
| 06.34 | Now lets see how Strings work in this application – |
| 06.39 | Strings can be put in variables like numbers |
| 06.43 | Strings cannot be used in mathematical or comparison operators |
| 06.49 | Strings are highlighted in red color |
| 06.53 | KTurtle identifies a line in double quotes as a string |
| 07.00 | I will clear the current code from editor.type clear command and Run to clean the canvas |
| 07.08 | Now I will explain about Boolean values. |
| 07.11 | There are only two boolean values: true and false. |
| 07.16 | For example Let's type the code |
| 07.20 | $answer = 7<5 |
| 07.28 | print $answer |
| 07.34 | Boolean value false is assigned to variable $answer because 7 is greater than 5 |
| 07.43 | Let's Run the code now |
| 07.47 | Turtle diplays Boolean value false on the canvas. |
| 07.51 | Let's next learn about “if-else” conditon. |
| 07.56 | ‘if’ condition is executed only if the boolean value evaluates ‘true’ |
| 08.03 | ‘else’ condition is executed only if the ‘if’ condition is ‘false’ . |
| 08.09 | I will clear the current code from editor.type clear command and Run to clean the canvas |
| 08.17 | I already have a code in a text file. |
| 08.21 | This code compares numbers 4 , 5 and 6 and displays the results accordingly on the canvas. |
| 08.30 | I will copy the code from text editor and paste it into KTurtle editor. |
| 08.36 | Pause the tutorial and type the program into your KTurtle editor. |
| 08.42 | Resume the tutorial after typing the program |
| 08.46 | Let's Run the code now |
| 08.49 | the Turtle has compared the values 4 and 5. |
| 08.53 | and has displayed the result 4 is smaller than 6 on the canvas . |
| 09.00 | With this we come to the end of this tutorial. |
| 09.05 | Let's summarize. |
| 09.07 | In this tutorial, we have learnt about |
| 09.11 | Grammar of Turtle script and |
| 09.14 | ‘if-else’ condition |
| 09.17 | Now to the assignment part. |
| 09.19 | Solve an equation using |
| 09.22 | if - else condition |
| 09.24 | Mathematical and comparision operators |
| 09.27 | Display the results using “print” and “go” commands. |
| 09.33 | To solve the assignment |
| 09.35 | Choose any four random numbers |
| 09.38 | Multiply two sets of random numbers |
| 09.42 | Compare the results using the comparison operators |
| 09.46 | Display both the results |
| 09.49 | Display greater result at the center of the canvas |
| 09.54 | You can choose any equation which you like. |
| 09.59 | Watch the video available at this URL http://spoken-tutorial.org/What is a Spoken Tutorial |
| 10.03 | It summarises the Spoken Tutorial project |
| 10.06 | If you do not have good bandwidth, you can download and watch it |
| 10.12 | The Spoken Tutorial Project Team : |
| 10.14 | Conducts workshops using spoken tutorials |
| 10.18 | Gives certificates to those who pass an online test |
| 10.22 | For more details, please write to contact@spoken-tutorial.org |
| 10.30 | Spoken Tutorial Project is a part of the Talk to a Teacher project |
| 10.35 | It is supported by the National Mission on Education through ICT, MHRD, Government of India |
| 1043 | More information on this Mission is available at this link http://spoken-tutorial.org/NMEICT-Intro ] |
| 10.48 | The Script is contributed by ITfC Bangaluru. |
| 10.52 | This is Madhuri Ganpathi from IIT Bombay signing off Thank you for joining. |
