Difference between revisions of "Ruby/C2/Hello-Ruby/English-timed"

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|00:00
 
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|Welcome to the Spoken Tutorial on  '''Hello''' '''Ruby'''!
+
| Welcome to the '''Spoken Tutorial''' on  '''Hello Ruby!'''.
  
 
|-
 
|-
 
|  00:04
 
|  00:04
−
| In this tutorial we will learn  
+
| In this tutorial, we will learn  
  
 
|-
 
|-
 
|  00:06
 
|  00:06
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| What is '''Ruby'''?
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| * What is '''Ruby'''?
  
 
|-
 
|-
 
|  00:08
 
|  00:08
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| Features
+
| * Features
  
 
|-  
 
|-  
 
|  00:09
 
|  00:09
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| '''RubyGems''' &   ''' Help on Ruby'''
+
| * '''RubyGems''' & Help on Ruby
  
 
|-
 
|-
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|-
 
|-
 
|  00:16
 
|  00:16
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|  Difference between '''puts''' and '''print'''  
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|  Difference between '''puts''' and '''print'''.
  
 
|-
 
|-
 
|  00:19
 
|  00:19
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|   Here we are using '''Ubuntu Linux '''version 12.04 '''Ruby''' 1.9.3
+
| Here we are using:
 +
* '''Ubuntu Linux '''version '''12.04'''
 +
* '''Ruby''' 1.9.3
  
 
|-
 
|-
 
|  00:27
 
|  00:27
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|  To follow this tutorial you must be connected to  internet.  
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|  To follow this tutorial, you must be connected to  internet.  
  
 
|-
 
|-
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|-
 
|-
 
| 00:54
 
| 00:54
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|  Now let us see some features of '''Ruby'''.
+
|  Now, let us see some features of '''Ruby'''.
  
 
|-
 
|-
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|-
 
|-
 
|  01:04
 
|  01:04
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|  Variables in '''Ruby''' have no datatype, such as in '''Smalltalk, BASIC''' or '''Python'''.
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|  Variables in '''Ruby''' have no datatype such as in '''Smalltalk, BASIC''' or '''Python'''.
  
 
|-
 
|-
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|-
 
|-
 
| 01:26
 
| 01:26
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| One of the most important feature of '''Ruby''' is '''RubyGems'''.
+
| One of the most important features of '''Ruby''' is '''RubyGems'''.
  
 
|-
 
|-
 
| 01:31  
 
| 01:31  
−
| '''RubyGems''' is a package manager for  '''Ruby''' programming language.
+
| '''RubyGems''' is a '''package manager''' for  '''Ruby''' programming language.
  
 
|-
 
|-
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|-
 
|-
 
|  01:46
 
|  01:46
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| For more information on '''RubyGems''' visit the following link.
+
| For more information on '''RubyGems''', visit the following link.
  
 
|-
 
|-
 
|  01:51
 
|  01:51
−
|  To get more help on '''Ruby''' you can visit the links shown.
+
|  To get more help on Ruby, you can visit the links shown.
  
 
|-
 
|-
 
|  01:55
 
|  01:55
−
| You can install '''Ruby '''using the '''Ubuntu Software Centre'''.
+
| You can install Ruby using the '''Ubuntu Software Centre'''.
  
 
|-
 
|-
 
|  01:59
 
|  01:59
−
| For more information on '''Ubuntu Software Centre''', please refer to the Ubuntu Linux Tutorials on this website.
+
| For more information on '''Ubuntu Software Centre''', please refer to the '''Ubuntu Linux Tutorials''' on this website.
  
 
|-
 
|-
 
|  02:07
 
|  02:07
−
|  Other methods for installing '''Ruby '''are as shown in this slide.
+
|  Other methods for installing Ruby are as shown in this slide.
  
 
|-
 
|-
 
|  02:12
 
|  02:12
−
| 'Ruby code '''can be executed in 3 ways
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| '''Ruby code '''can be executed in 3 ways-
  
 
|-
 
|-
 
|  02:16
 
|  02:16
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| '''Command line '''
+
|* '''Command line '''
  
 
|-
 
|-
 
|  02:17
 
|  02:17
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| '''Interactive Ruby'''
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|* '''Interactive Ruby'''
  
 
|-
 
|-
 
|  02:19
 
|  02:19
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| As a '''file''  
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|* As a '''file'''.
  
 
|-
 
|-
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|-
 
|-
 
|  02:23
 
|  02:23
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|  First let us see how to execute the  '''Hello World''' code from  command line.
+
|  First, let us see how to execute the  '''Hello World''' code from  '''command line'''.
  
 
|-
 
|-
 
|  02:28
 
|  02:28
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| Open a terminal by pressing the '''Ctrl, Alt and T '''keys simultaneously.  
+
| Open a '''terminal''' by pressing the '''Ctrl, Alt''' and '''T '''keys simultaneously.  
  
 
|-
 
|-
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|-
 
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| 02:37
 
| 02:37
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|  Type the command
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|  Type the command:
  
 
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|-
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|-
 
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|  07:00
 
|  07:00
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|  Let's execute the file . Type '''ruby space hello dot rb''' and press '''Enter'''
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|  Let's execute the file. Type: '''ruby space hello dot rb''' and press '''Enter'''.
  
 
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|-
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|-
 
|-
 
|  07:13
 
|  07:13
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|  Now let me demonstrate the difference between '''puts''' and '''print '''statement.
+
|  Now, let me demonstrate the difference between '''puts''' and '''print '''statement.
  
 
|-
 
|-
 
|  07:18
 
|  07:18
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| We will try this out using''' irb'''
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| We will try this out using''' irb'''.
  
 
|-
 
|-
 
|  07:22
 
|  07:22
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|  Before that we need to go back to the home directory.To do so type '''cd '''and press '''Enter'''
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|  Before that, we need to go back to the home directory. To do so, type "cd" and press '''Enter'''.
  
 
|-
 
|-
 
|  07:31
 
|  07:31
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|Now type '''irb''' and Press Enter''' to launch the '''Interactive Ruby.'''
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|Now, type '''irb''' and press '''Enter''' to launch the '''Interactive Ruby.'''
  
 
|-
 
|-
 
|  07:39
 
|  07:39
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|  Type '''puts '''space within double quotes '''Hello '''comma within double quotes '''World '''
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|  Type: '''puts '''space within double quotes '''Hello '''comma within double quotes '''World '''.
  
 
|-
 
|-
 
|  07:50
 
|  07:50
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| Here''' comma '''is used to join the two '''puts''' command together.
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| Here,''' comma '''is used to join the two '''puts''' commands together.
  
 
|-
 
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|  07:55
 
|  07:55
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| Now press '''Enter.'''
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| Now, press '''Enter.'''
  
 
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|-
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| 08:03
 
| 08:03
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|  Now let's try the same thing with '''print.'''
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|  Now, let's try the same thing with '''print.'''
  
 
|-
 
|-
 
|  08:06
 
|  08:06
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| Press up arrow key to get the previous command
+
| Press up-arrow key to get the previous command.
  
 
|-
 
|-
 
|  08:09
 
|  08:09
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| Replace puts with print and   Press '''Enter.'''
+
| Replace '''puts''' with '''print''' and press '''Enter.'''
  
 
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|-
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|  08:27
 
|  08:27
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|   The keyword''' print '''outputs only what we have provided.
+
| The keyword''' print '''outputs only what we have provided.
  
 
|-
 
|-
 
|  08:31
 
|  08:31
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|   This brings us to the end of this Spoken Tutorial. Let us switch back to our slides.
+
| This brings us to the end of this Spoken Tutorial. Let us switch back to our slides.
  
 
|-
 
|-
 
|  08:37
 
|  08:37
−
| In this tutorial we have learnt
+
| In this tutorial, we have learnt:
  
 
|-
 
|-
 
|  08:39
 
|  08:39
−
| About '''Ruby'''
+
|* About '''Ruby'''
  
 
|-
 
|-
 
|  08:41
 
|  08:41
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| Installation
+
|* Installation
  
 
|-
 
|-
 
|  08:42
 
|  08:42
−
| Execution of '''Ruby '''code  
+
|* Execution of '''Ruby '''code  
  
 
|-
 
|-
 
|  08:44
 
|  08:44
−
| Adding multiple comments using  =begin and  =end
+
|* Adding multiple comments using  =begin and  =end
  
 
|-
 
|-
 
|  08:50
 
|  08:50
−
| Difference between '''puts''' and '''print'''
+
|* Difference between '''puts''' and '''print'''.
  
 
|-
 
|-
 
|  08:53
 
|  08:53
−
| As an assignment
+
| As an assignment,
  
 
|-
 
|-
 
| 08:55  
 
| 08:55  
−
| Write a program to print your name and age  
+
| write a program to print your name and age.
  
 
|-
 
|-
 
|  08:58
 
|  08:58
−
| We used '''multiple line comments''' in this tutorial  
+
| We used '''multiple line comments''' in this tutorial.
  
 
|-
 
|-
 
|  09:01
 
|  09:01
−
| Try to give '''single line comment'''  
+
| Try to give '''single line comment'''.
  
 
|-
 
|-
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|  09:07
 
|  09:07
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| It summarises the Spoken Tutorial project.
+
| It summarizes the Spoken Tutorial project.
  
 
|-
 
|-
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|-
 
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|  09:15
 
|  09:15
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|   The Spoken Tutorial Project Team :
+
| The Spoken Tutorial Project team:
  
 
|-
 
|-
 
|  09:17
 
|  09:17
−
| Conducts workshops using spoken tutorials  
+
|* Conducts workshops using spoken tutorials.
  
 
|-
 
|-
 
|  09:20
 
|  09:20
−
| Gives certificates to those who pass an online test  
+
|* Gives certificates to those who pass an online test.
  
 
|-
 
|-
 
|  09:24
 
|  09:24
−
| For more details, please write to contact@spoken-tutorial.org
+
| For more details, please write to: contact@spoken-tutorial.org
  
 
|-
 
|-
 
|  09:30
 
|  09:30
−
|  Spoken Tutorial Project is a part of Talk to a Teacher project.
+
|  '''Spoken Tutorial''' project is a part of '''Talk to a Teacher''' project.
  
 
|-
 
|-
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|-
 
|-
 
|  09:41
 
|  09:41
−
| More information on this Mission is available at below link
+
| More information on this mission is available at below link.
  
 
|-
 
|-
 
| 09:45  
 
| 09:45  
−
| This is Afrin Pinjari from IIT Bombay, signing off.
+
| This is Afrin Pinjari from '''IIT Bombay''', signing off.
  
 
|-
 
|-

Revision as of 15:16, 28 October 2015

Time Narration
00:00 Welcome to the Spoken Tutorial on Hello Ruby!.
00:04 In this tutorial, we will learn
00:06 * What is Ruby?
00:08 * Features
00:09 * RubyGems & Help on Ruby
00:12 Installation
00:13 Running Ruby code
00:15 Commenting
00:16 Difference between puts and print.
00:19 Here we are using:
  • Ubuntu Linux version 12.04
  • Ruby 1.9.3
00:27 To follow this tutorial, you must be connected to internet.
00:30 You must have knowledge of using Terminal and Text editor in Linux.
00:37 Now I will explain what is Ruby.
00:40 Ruby is an object-oriented, interpreted scripting language.
00:44 It is dynamic, open source programming language.
00:48 It has an elegant syntax that is natural to read and easy to write.
00:54 Now, let us see some features of Ruby.
00:57 Ruby is highly portable.
00:59 Ruby program runs in any operating system.
01:04 Variables in Ruby have no datatype such as in Smalltalk, BASIC or Python.
01:11 It supports automatic memory management.
01:14 Ruby is free format language.
01:17 You can start writing your program from any line and column.
01:21 Ruby is used for developing Internet and Intra-net applications.
01:26 One of the most important features of Ruby is RubyGems.
01:31 RubyGems is a package manager for Ruby programming language.
01:36 It provides a standard format for distributing Ruby programs and libraries.
01:42 You can create and publish your own gems.
01:46 For more information on RubyGems, visit the following link.
01:51 To get more help on Ruby, you can visit the links shown.
01:55 You can install Ruby using the Ubuntu Software Centre.
01:59 For more information on Ubuntu Software Centre, please refer to the Ubuntu Linux Tutorials on this website.
02:07 Other methods for installing Ruby are as shown in this slide.
02:12 Ruby code can be executed in 3 ways-
02:16 * Command line
02:17 * Interactive Ruby
02:19 * As a file.
02:20 We will go through each method of execution.
02:23 First, let us see how to execute the Hello World code from command line.
02:28 Open a terminal by pressing the Ctrl, Alt and T keys simultaneously.
02:33 A terminal window appears on your screen.
02:37 Type the command:
02:38 ruby space hyphen e space within single quotes puts space then within double quotes Hello World and
02:50 Press Enter.
02:53 We get the output as Hello World.
02:56 puts command is used to print the output on the terminal.
03:00 The hyphen e flag allows only a single line of code to be executed.
03:06 Multiple hyphen e flags can be used to execute multiple line commands.
03:11 Lets try this out
03:13 Now press the up Arrow key to get the previous command and
03:18 Type space hyphen e space within single quotes puts space 1+2 and
03:30 Press Enter.
03:32 We get the output as Hello World and 3.
03:36 Let's switch back to our slide
03:38 We will now learn about Interactive Ruby.
03:42 Interactive Ruby allows the execution of Ruby commands with immediate response.
03:48 You can run Ruby statements and examine the output and return values.
03:53 For older version of Ruby, install irb separately.
03:57 Now let us execute our Ruby code through irb. Go to the terminal
04:03 Typeirb and Press Enter
04:06 to launch the Interactive Ruby
04:09 Type puts space within double quotes Hello World and press Enter.
04:19 We get the output as Hello World.
04:22 And We get the return value as nil.
04:25 To exit from irb type exit and press Enter.
04:31 You can also run Ruby program from a file.
04:34 You can use any text editor of your choice to write the code.
04:39 I am using gedit text editor. Let me switch to gedit text editor
04:45 Now, type puts space within double quotes Hello World
04:54 Lets learn how to add multiple line or block comments.
04:59 Before the puts command
05:01 Type, equal to begin and press Enter
05:06 'Equal to begin is used to start the comment.
05:10 Type the comments that you wish to add.
05:13 I will type My first Ruby program
05:20 and Press Enter
05:22 Then type This code will print helloworld and Press Enter
05:30 Now type equal to end
05:32 equal to end is used to end the multiple line comments.
05:37 Comments are useful to understand the flow of program.
05:41 It is useful for documentation.
05:45 Now, let us save the file by clicking on the Save button.
05:50 It is a good practice to save the file frequently.
05:53 The Save As dialog box appears on your screen.
05:57 Browse the location where you want to save the file.
06:01 On 'Desktop, I will create a folder named rubyprogram.
06:06 We will save the file inside this folder.
06:10 In the Name text-box, type the name that you wish to add.
06:14 I will type hello.rb
06:17 Dot rb extension is given to a Ruby file
06:21 Then click on Save button to save the file. So the file is saved now.
06:28 To execute the code, go to the terminal.
06:32 Lets clear the terminal first.
06:35 Make sure that you are in the directory where your Ruby file is present.
06:39 Remember that we are in the home directory. We need to go to the subdirectory rubyprogram.
06:47 To do so, type cd space Desktop/rubyprogram and press Enter.
07:00 Let's execute the file. Type: ruby space hello dot rb and press Enter.
07:10 We get the output HelloWorld.
07:13 Now, let me demonstrate the difference between puts and print statement.
07:18 We will try this out using irb.
07:22 Before that, we need to go back to the home directory. To do so, type "cd" and press Enter.
07:31 Now, type irb and press Enter to launch the Interactive Ruby.
07:39 Type: puts space within double quotes Hello comma within double quotes World .
07:50 Here, comma is used to join the two puts commands together.
07:55 Now, press Enter.
07:57 We get the output Hello World, but on separate lines.
08:03 Now, let's try the same thing with print.
08:06 Press up-arrow key to get the previous command.
08:09 Replace puts with print and press Enter.
08:14 We get the output as Hello World but on the same line.
08:19 The keyword puts adds a newline to the end of the output. The keyword print does not.
08:27 The keyword print outputs only what we have provided.
08:31 This brings us to the end of this Spoken Tutorial. Let us switch back to our slides.
08:37 In this tutorial, we have learnt:
08:39 * About Ruby
08:41 * Installation
08:42 * Execution of Ruby code
08:44 * Adding multiple comments using =begin and =end
08:50 * Difference between puts and print.
08:53 As an assignment,
08:55 write a program to print your name and age.
08:58 We used multiple line comments in this tutorial.
09:01 Try to give single line comment.
09:04 Watch the video available at the following link.
09:07 It summarizes the Spoken Tutorial project.
09:10 If you do not have good bandwidth, you can download and watch it.
09:15 The Spoken Tutorial Project team:
09:17 * Conducts workshops using spoken tutorials.
09:20 * Gives certificates to those who pass an online test.
09:24 For more details, please write to: contact@spoken-tutorial.org
09:30 Spoken Tutorial project is a part of Talk to a Teacher project.
09:34 It is supported by the National Mission on Education through ICT, MHRD, Government of India.
09:41 More information on this mission is available at below link.
09:45 This is Afrin Pinjari from IIT Bombay, signing off.
09:50 Thank you for watching.

Contributors and Content Editors

Devraj, PoojaMoolya, Pratik kamble, Ranjana, Sandhya.np14, Sneha

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