Difference between revisions of "BASH/C2/More-on-Loops/English-timed"

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| Welcome to the spoken tutorial on  '''Nested for loop in BASH'''
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| Welcome to the '''spoken tutorial''' on  '''Nested for loop''' in '''BASH'''.
  
 
|-
 
|-
 
| 00:07
 
| 00:07
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| In this tutorial, we will learn  '''Nested for loop''' With the help of an example.
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| In this tutorial, we will learn  '''Nested for loop''' with the help of an example.
  
 
|-
 
|-
 
| 00:13
 
| 00:13
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| To record this tutorial I am using '''Ubuntu Linux''' 12.04 '''Operating System''' and '''GNU BASH''' version 4.1.10
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| To record this tutorial, I am using '''Ubuntu Linux''' 12.04 '''Operating System''' and '''GNU BASH''' version 4.1.10
  
 
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|-
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|For relevant tutorials, please visit our website which as shown http://spoken-tutorial.org
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|For relevant tutorials, please visit our website which is as shown- http://spoken-tutorial.org
  
 
|-
 
|-
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|00:46
 
|00:46
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|A loop within a loop is known as '''nested loop.'''
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|A '''loop''' within a '''loop''' is known as '''nested loop.'''
  
 
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| 00:51
 
| 00:51
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| Let us see the syntax Outer '''for loop''' '''expression 1, 2, 3'''
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| Let us see the syntax. Outer '''for loop''' '''expression 1, 2, 3''';
  
 
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| 00:57
 
| 00:57
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|Inner '''for loop''' '''expression 1, 2, 3'''
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|inner '''for loop''' '''expression 1, 2, 3''';
  
 
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| 01:01
 
| 01:01
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| '''statement 1''' '''statement 2'''
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| '''statement 1''', '''statement 2'''
  
 
|-
 
|-
 
| 01:04
 
| 01:04
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| Closing Inner '''for loop''' Closing Outer '''for loop'''
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| closing inner '''for loop''', closing outer '''for loop'''.
  
 
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| First let us go through the directory structure.
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| First, let us go through the '''directory structure'''.
  
 
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| We have subdirectories '''test''', '''test2''' and '''test3''' and a '''Bash script'''.
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| We have sub-directories '''test''', '''test2''', '''test3''' and a '''Bash script'''.
  
 
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| Now we will move on to our code.
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| Now we will move on to our '''code'''.
  
 
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|01:39
 
|01:39
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|This program displays all the files within each subdirectory.
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|This program displays all the files within each sub-directory.
  
 
|-
 
|-
 
|01:45
 
|01:45
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|Please note that the same can be acheived with a single line command '''ls -1 (hyphen one) -R(hyphen R) test*(test asterix)'''
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|Please note that the same can be achieved with a '''single line command''' '''ls -1 (hyphen one) -R(hyphen R) test*(test asterix)'''.
  
 
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| Note that the name of our''' Bash script''' is''' nested-(Hyphen)for dot sh'''
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| Note that the name of our''' Bash script''' is''' nested-(Hyphen)for dot sh'''.
  
 
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|This '''for loop''' will check for directories starting with the name '''test'''.
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|This '''for loop''' will check for '''directories''' starting with the name '''test'''.
  
 
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|02:15
 
|02:15
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|First '''echo''' line will display the sub-directories name
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|First '''echo''' line will display the sub-directories name.
  
 
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| This is the inner '''for loop'''.It will check for files present within the directories.
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| This is the inner '''for loop'''. It will check for files present within the directories.
  
 
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| Here we list the files.'''done''' ends the inner '''for loop'''.
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| Here, we list the files. '''done''' ends the inner '''for loop'''.
  
 
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|02:45
 
|02:45
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|This command prints a vertical line after completion of every cycle of outer '''for-loop.'''
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|This '''command''' prints a vertical line after completion of every cycle of outer '''for-loop.'''
  
 
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| Let us execute the program.
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| Let us '''execute''' the program.
  
 
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|Type '''cd Desktop'''. Let us go in the folder '''simple-(Hyphen)nested-(Hyphen)for'''
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|Type: '''cd Desktop'''. Let us go in the '''folder''' '''simple-(Hyphen)nested-(Hyphen)for'''.
  
 
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| Type '''chmod plus +x nested-(Hyphen)for dot sh'''
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| Type: '''chmod plus +x nested-(Hyphen)for dot sh'''
  
 
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|Type dot slash '''nested-(Hyphen)for dot sh'''
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|Type: dot slash '''nested-(Hyphen)for dot sh'''
  
 
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|The output is displayed. It shows  Files in '''test''' directory. Files in '''test2''' directory.And files in '''test3''' directory.
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|The '''output''' is displayed. It shows  files in '''test''' directory, files in '''test2''' directory and files in '''test3''' directory.
  
 
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|03:52
 
|03:52
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|This brings us to the end of this tutorial.
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|This brings us to the end of this '''tutorial'''.
  
 
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|03:56
 
|03:56
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|Let us summarize.In this tutorial we learnt,'''Nested for loop'''
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|Let us summarize. In this tutorial we learned '''Nested for loop'''.
  
 
|-
 
|-
 
| 04:02
 
| 04:02
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| As an assignment
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| As an assignment:
  
 
|-
 
|-
 
|04:04
 
|04:04
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|Retype '''nested (hyphen)-for dot sh bash script using nested while loop.'''
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|* Retype: '''nested (hyphen)-for dot sh bash script using nested while loop.'''
  
 
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|04:11
 
|04:11
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|Save your program with the name ''''nested-(hyphen)while Dot sh''''
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|* Save your program with the name ''''nested-(hyphen)while Dot sh''''.
  
 
|-
 
|-
 
| 04:17
 
| 04:17
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| Watch the video available at the link shown below.It summarises the Spoken Tutorial project  
+
| Watch the video available at the link shown below. It summarizes the Spoken-Tutorial project.
  
 
|-
 
|-
 
| 04:23
 
| 04:23
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|If you do not have good bandwidth, you can download and watch it
+
|If you do not have good bandwidth, you can download and watch it.
  
 
|-
 
|-
 
| 04:28
 
| 04:28
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| The Spoken Tutorial Project Team Conducts workshops using spoken tutorials Gives certificates to those who pass an online test  
+
| The Spoken Tutorial Project team:
 +
* Conducts workshops using spoken tutorials.
 +
* Gives certificates to those who pass an online test.
  
 
|-
 
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| 04:45
 
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| 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
+
| '''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.
  
 
|-
 
|-
 
| 04:57
 
| 04:57
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|More information on this Mission is available at: http://spoken-tutorial.org\NMEICT-Intro
+
|More information on this mission is available at: http://spoken-tutorial.org\NMEICT-Intro
  
 
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| 05:08
 
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|This is Ashwini Patil from IIT Bombay.Thank You for joining.
+
|This is Ashwini Patil from IIT Bombay. Thank You for joining.
  
 
|}
 
|}

Revision as of 21:25, 3 July 2015

Time Narration
00:01 Welcome to the spoken tutorial on Nested for loop in BASH.
00:07 In this tutorial, we will learn Nested for loop with the help of an example.
00:13 To record this tutorial, I am using Ubuntu Linux 12.04 Operating System and GNU BASH version 4.1.10
00:24 Please note, GNU Bash version 4 or above is recommended for practice.
00:31 To learn this tutorial, you should be familiar with loops in Bash.
00:37 For relevant tutorials, please visit our website which is as shown- http://spoken-tutorial.org
00:43 Let us start with an introduction to nested loop.
00:46 A loop within a loop is known as nested loop.
00:51 Let us see the syntax. Outer for loop expression 1, 2, 3;
00:57 inner for loop expression 1, 2, 3;
01:01 statement 1, statement 2
01:04 closing inner for loop, closing outer for loop.
01:09 Let us see an example on nested for loop.
01:12 First, let us go through the directory structure.
01:17 Here is a directory on the Desktop named simple-nested-for. Let's open it.
01:24 We have sub-directories test, test2, test3 and a Bash script.
01:31 In each sub-directory, there are multiple text files.
01:36 Now we will move on to our code.
01:39 This program displays all the files within each sub-directory.
01:45 Please note that the same can be achieved with a single line command ls -1 (hyphen one) -R(hyphen R) test*(test asterix).
01:53 But we will do it using a for loop.
01:58 Note that the name of our Bash script is nested-(Hyphen)for dot sh.
02:05 This is our shebang line.
02:08 This is the outer for loop.
02:10 This for loop will check for directories starting with the name test.
02:15 First echo line will display the sub-directories name.
02:21 The second echo line will create a blank line.
02:25 This is the inner for loop. It will check for files present within the directories.
02:32 ls displays the directory content.
02:36 -1 (hyphen one) is used to list one file per line.
02:41 Here, we list the files. done ends the inner for loop.
02:45 This command prints a vertical line after completion of every cycle of outer for-loop.
02:53 done ends the outer for loop.
02:57 Let us execute the program.
02:58 Open the terminal by pressing ctrl+alt+t keys simultaneously on your keyboard.
03:08 Now, let us go to the directory where our Bash script is.
03:13 It is on the Desktop.
03:15 Type: cd Desktop. Let us go in the folder simple-(Hyphen)nested-(Hyphen)for.
03:22 Press Enter.
03:24 Type: chmod plus +x nested-(Hyphen)for dot sh
03:32 Press Enter.
03:34 Type: dot slash nested-(Hyphen)for dot sh
03:39 Press Enter.
03:40 The output is displayed. It shows files in test directory, files in test2 directory and files in test3 directory.
03:52 This brings us to the end of this tutorial.
03:56 Let us summarize. In this tutorial we learned Nested for loop.
04:02 As an assignment:
04:04 * Retype: nested (hyphen)-for dot sh bash script using nested while loop.
04:11 * Save your program with the name 'nested-(hyphen)while Dot sh'.
04:17 Watch the video available at the link shown below. It summarizes the Spoken-Tutorial project.
04:23 If you do not have good bandwidth, you can download and watch it.
04:28 The Spoken Tutorial Project team:
  • Conducts workshops using spoken tutorials.
  • Gives certificates to those who pass an online test.
04:37 For more details, please write to contact@spoken-tutorial.org
04:45 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.
04:57 More information on this mission is available at: http://spoken-tutorial.org\NMEICT-Intro
05:03 The script has been contributed by FOSSEE and Spoken-tutorial team.
05:08 This is Ashwini Patil from IIT Bombay. Thank You for joining.

Contributors and Content Editors

Pratik kamble, Sandhya.np14

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