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

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|  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
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| Features, '''RubyGems''' &  Help on Ruby
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+
−
|-
+
−
|  00:09
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−
| * '''RubyGems''' &  Help on Ruby
+
  
 
|-
 
|-
 
| 00:12  
 
| 00:12  
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|  Installation
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|  Installation, Running '''Ruby''' code
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+
−
|-
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|  00:13
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−
|  Running '''Ruby''' code
+
  
 
|-
 
|-
 
|  00:15
 
|  00:15
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|  Commenting
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|  Commenting,  Difference between '''puts''' and '''print'''.  
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+
−
|-
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|  00:16
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|  Difference between '''puts''' and '''print'''.  
+
  
 
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|  00:19
 
|  00:19
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| Here we are using:
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| Here, we are using: '''Ubuntu Linux '''version '''12.04''',  '''Ruby''' 1.9.3
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* '''Ubuntu Linux '''version '''12.04'''  
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−
* '''Ruby''' 1.9.3
+
  
 
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|-
 
|  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.  
  
 
|-
 
|-
 
|  00:30
 
|  00:30
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| You must have knowledge of using '''Terminal '''and '''Text editor '''in '''Linux'''.  
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| You must have the knowledge of using '''Terminal '''and '''Text editor '''in '''Linux'''.  
  
 
|-
 
|-
 
|  00:37
 
|  00:37
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|  Now I will explain what is '''Ruby'''.
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|  Now, I will explain you what is '''Ruby'''.
  
 
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|  01:14
 
|  01:14
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|  '''Ruby''' is free format language.
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|  '''Ruby''' is a free format language.
  
 
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|-
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|-
 
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|  01:55
 
|  01:55
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| You can install Ruby using the '''Ubuntu Software Centre'''.
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| You can install Ruby using '''Ubuntu Software Centre'''.
  
 
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|-
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|  02:16
 
|  02:16
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|* '''Command line '''
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| '''Command line ''', '''Interactive Ruby''' and
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+
−
|-
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|  02:17
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−
|* '''Interactive Ruby'''
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|-
 
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|  02:19
 
|  02:19
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|* As a '''file'''.  
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| As a '''file'''.  We will go through each method of execution.
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+
−
|-
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| 02:20
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−
| We will go through each method of execution.
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|  02:33
 
|  02:33
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| A terminal window appears on your screen.
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| A '''terminal window''' appears on your screen.
  
 
|-
 
|-
 
| 02:37
 
| 02:37
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|  Type the command:
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|  Type the command: '''ruby''' ''space''  ''hyphen'' '''e''' ''space'' within single quotes '''puts''' ''space'' then within double quotes '''Hello World''' and
−
 
+
−
|-
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|  02:38
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−
| '''ruby''' ''space''  ''hyphen'' '''e''' ''space'' within single quotes '''puts''' ''space'' then within double quotes '''Hello World''' and
+
  
 
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|  02:53
 
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|   We get the output as '''HelloWorld.'''
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| We get the output as "HelloWorld".
  
 
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| 03:00
 
| 03:00
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|  The hyphen 'e' '''flag''' allows only a single line of code to be executed.
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|  The hyphen 'e' '''flag''' allows only a single line of a code to be executed.
  
 
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|-
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|  03:32
 
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|  We get the output as '''Hello World '''and''' 3.'''
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|  We get the output as "Hello World" and''' 3.'''
  
 
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|  03:38
 
|  03:38
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|We will now learn about '''Interactive Ruby.'''
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| We will now learn about '''Interactive Ruby.'''
  
 
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| You can run Ruby statements and examine the output and return values.
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| You can run Ruby statements and examine the output and the return values.
  
 
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|  03:53
 
|  03:53
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| For older version of Ruby, install '''irb''' separately.
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| For older version of Ruby, install the '''irb''' separately.
  
 
|-
 
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|  03:57
 
|  03:57
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| Now, let us execute our '''Ruby code '''through '''irb.''' Go to the terminal.  
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| Now, let us execute our Ruby code through 'irb'. Go to the '''terminal'''.  
  
 
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| 04:19
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|We get the output as '''Hello World.'''
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|We get the output as '''Hello World'''
  
 
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|  04:22
 
|  04:22
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|   And We get the return value as '''nil.'''
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| and we get the return value as '''nil.'''
  
 
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| 04:31
 
| 04:31
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|  You can also run '''Ruby program''' from a file.
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|  You can also run the '''Ruby program''' from a file.
  
 
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|  I am using '''gedit '''text editor'''. Let me switch to  '''gedit''' text editor.
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|  I am using '''gedit '''text editor. Let me switch to  '''gedit''' text editor.
  
 
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| 05:32
 
| 05:32
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| ''equal to'' '''end '''is used to end the '''multiple line comment'''s.
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| ''equal to'' '''end '''is used to end the '''multiple line comments'''.
  
 
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|  Then click on '''Save '''button to save the file.  So, the file is saved now.  
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|  Then click on the '''Save '''button to save the file.  So, the file is saved now.  
  
 
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|   Remember that we are in the '''home '''directory. We need to go to the sub-directory '''rubyprogram'''.
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| Remember that we are in the '''home '''directory. We need to go to the sub-directory '''rubyprogram'''.
  
 
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| We get the output: "HelloWorld".
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| We get the output as "HelloWorld".
  
 
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|  07:13
 
|  07:13
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|  Now, let me demonstrate the difference between '''puts''' and '''print '''statement.
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|  Now, let me demonstrate the difference between '''puts''' and '''print '''statements.
  
 
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| We will try this out using''' irb'''.
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| We will try this out using "irb".
  
 
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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 our '''home''' directory. To do so, type "cd" and press '''Enter'''.
  
 
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|  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.'''
  
 
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|  We get the output '''Hello World,''' but on separate lines.
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|  We get the output '''Hello,  World,''' but on the separate lines.
  
 
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|  08:31
 
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| This brings us to the end of this Spoken Tutorial. Let us switch back to our slides.
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| This brings us to the end of this Spoken Tutorial. Let us switch back to our slide.
  
 
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|  08:39
 
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|* About '''Ruby'''
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| About '''Ruby''', Installation
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+
−
|-
+
−
| 08:41
+
−
|* Installation
+
  
 
|-
 
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|  08:42
 
|  08:42
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|* Execution of '''Ruby '''code  
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| Execution of '''Ruby '''code  
  
 
|-
 
|-
 
|  08:44
 
|  08:44
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|* Adding multiple comments using  =begin and  =end
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| Adding multiple comments using  =begin and  =end
  
 
|-
 
|-
 
|  08:50
 
|  08:50
−
|* Difference between '''puts''' and '''print'''.
+
| Difference between '''puts''' and '''print'''.
  
 
|-
 
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|  09:17
 
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|* Conducts workshops using spoken tutorials.  
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| Conducts workshops using spoken tutorials.  
  
 
|-
 
|-
 
|  09:20
 
|  09:20
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|* Gives certificates to those who pass an online test.  
+
| Gives certificates to those who pass an online test.  
  
 
|-
 
|-
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|  09:30
 
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|  '''Spoken Tutorial''' project is a part of '''Talk to a Teacher''' project.
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|  '''Spoken Tutorial''' project is a part of the '''Talk to a Teacher''' project.
  
 
|-
 
|-
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|  09:41
 
|  09:41
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| More information on this mission is available at below link.
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| More information on this mission is available at the below link.
  
 
|-
 
|-

Latest revision as of 11:57, 10 March 2017

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, RubyGems & Help on Ruby
00:12 Installation, Running Ruby code
00:15 Commenting, 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 the knowledge of using Terminal and Text editor in Linux.
00:37 Now, I will explain you 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 a 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 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 , Interactive Ruby and
02:19 As a file. 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: 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 "HelloWorld".
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 a code to be executed.
03:06 Multiple hyphen 'e' flags can be used to execute multiple line commands.
03:11 Let's 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 the return values.
03:53 For older version of Ruby, install the irb separately.
03:57 Now, let us execute our Ruby code through 'irb'. Go to the terminal.
04:03 Type "irb" 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 the 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 Let's 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 the Save button to save the file. So, the file is saved now.
06:28 To execute the code, go to the terminal.
06:32 Let's 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 sub-directory 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 as "HelloWorld".
07:13 Now, let me demonstrate the difference between puts and print statements.
07:18 We will try this out using "irb".
07:22 Before that, we need to go back to our 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 the 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 slide.
08:37 In this tutorial, we have learnt:
08:39 About Ruby, 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 the 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 the 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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