BASH/C2/Nested-and-multilevel-if-elsif-statements/English - Revision history

Nancyvarkey at 08:37, 1 February 2014

2014-02-01T08:37:08Z

Nancyvarkey at 08:20, 12 November 2013

2013-11-12T08:20:46Z

Ashwini at 11:20, 8 November 2013

2013-11-08T11:20:27Z

Ashwini at 05:20, 24 October 2013

2013-10-24T05:20:56Z

Show changes

Nancyvarkey at 09:44, 23 October 2013

2013-10-23T09:44:00Z

Nancyvarkey at 13:11, 22 October 2013

2013-10-22T13:11:00Z

Ashwini at 07:20, 22 October 2013

2013-10-22T07:20:52Z

Ashwini at 12:07, 30 September 2013

2013-09-30T12:07:51Z

Ashwini at 12:06, 30 September 2013

2013-09-30T12:06:09Z

Show changes

Ashwini at 11:38, 30 September 2013

2013-09-30T11:38:30Z

@@ Line 273: / Line 273: @@
 Go to ./'''nestedifelse.sh '''
 |-
@@ Line 312: / Line 314: @@
 This is because the name '''swati''' does not match the previously declared value '''anusha.'''
 |-
@@ Line 349: / Line 353: @@
 | style="border:1pt solid #000000;padding:0.097cm;"| I have a working example.
-I will open it.
+I will open it.  Note that our file name is '''multilevel-ifelse dot sh'''.
 |-
@@ Line 382: / Line 386: @@
 '''echo "$mystring contains word raj"'''
-| style="border:1pt solid #000000;padding:0.097cm;"| The first '''elsif condition '''checks whether''' '''the''' input string''' contains '''raj.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| The first '''elif condition '''checks whether''' '''the''' input string''' contains '''raj.'''
 If it does, then this '''echo statement '''will be printed.
@@ Line 392: / Line 396: @@
 '''echo "$mystring contains word jit"'''
-| style="border:1pt solid #000000;padding:0.097cm;"| The next '''elsif condition '''checks whether the''' input string''' contains the word '''jit.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| The next '''elif condition '''checks whether the''' input string''' contains the word '''jit.'''
 If it does, then this '''echo statement '''will be printed.
@@ Line 402: / Line 406: @@
 | style="border:1pt solid #000000;padding:0.097cm;"| The '''else condition '''will be executed when all the above '''conditions''' fail.
-And it will display the message “'''Sorry! Input does not contain raj or jit”'''
+And it will display the message “'''Sorry! Input does not contain either 'raj' or 'jit'”'''
 |-
@@ Line 435: / Line 439: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| '''Enter a Word:'''
 | style="border:1pt solid #000000;padding:0.097cm;"| First I will press '''Enter '''without typing anything.
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output:''' " Nothing is Entered"'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The message “'''Nothing was Entered” '''is displayed.''' '''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The message "'''Nothing was Entered '''" is displayed.
-And the control comes out of the '''Multilevel if-else statement.'''
+And the control comes out of the '''multilevel if-else statement.'''
 |-
@@ Line 452: / Line 452: @@
 | style="border:1pt solid #000000;padding:0.097cm;"| Let me clear the prompt.
-Let us execute the script again with a different input.
+Let us try executing the script with a different input.
 |-
@@ Line 459: / Line 465: @@
 Type '''abhijit'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| I will type '''abhijit.'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The prompt displays '''"Enter a Word".'''
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output: '''“abijit contains word jit”'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The output is displayed as '''“abhijit contains word jit”.'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The output displayed is '''“abhijit contains word jit”.'''
 This shows that the control flowed to the third '''condition''' in our code.
@@ Line 498: / Line 506: @@
 * lesser than 3,
 * or equal to 3,
-* Or when the user input is empty
+* or when the user input is empty
 |-

@@ Line 111: / Line 111: @@
 | style="border:1pt solid #000000;padding:0.176cm;"| The''' read '''command reads''' one line''' of data from''' '''the '''standard input.'''
-'''-p''' flag displays the '''prompt'''.
+'''- (hyphen) p''' flag displays the '''prompt'''.
-The string after '''-p, “Enter name: ” '''will be displayed on the '''terminal'''.
+The string after '''- (hyphen) p, “Enter name: ” '''will be displayed on the '''terminal'''.
 '''myname '''is a''' '''variable which stores the''' '''text entered by user i.e. the user input'''.'''
@@ Line 131: / Line 131: @@
 Here,
-'''-s '''flag is for''' silent mode. '''
+'''- (hyphen) s '''flag is for''' silent mode. '''
 It means the text entered by the user will NOT be displayed on the '''terminal.'''
@@ Line 148: / Line 148: @@
 '''fi'''
 | style="border:1pt solid #000000;padding:0.097cm;"| Here we have another set of '''if-else statements'''.
@@ Line 214: / Line 213: @@
 Type:
-'''chmod''' space''' plus x''' space''' nestedifelse.sh '''and press''' Enter.'''
+'''chmod''' space''' plus x''' space''' nestedifelse.sh '''
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Type ./nestedifelse>> '''press '''Enter'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now type '''dot slash nestedifelse.sh''' and press '''Enter.'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now type '''dot slash nestedifelse.sh'''
 |-
@@ Line 273: / Line 272: @@
-Go to ./'''nestedifelse.sh '''and press '''Enter'''
+Go to ./'''nestedifelse.sh '''
-−
-−
-−
 |-
@@ Line 319: / Line 315: @@
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"|
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The control comes out of the first '''if statement '''and executes the '''else statement.'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| This prints the message “'''Wrong name”.'''
-−
 This prints the message “'''Wrong name”.'''
 '''<nowiki><PAUSE></nowiki>'''
@@ Line 367: / Line 361: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| '''read -p "Enter a Word : " mystring'''
-| style="border:1pt solid #000000;padding:0.097cm;"| '''mystring '''is a variable which stores the word input by user during execution.
+| style="border:1pt solid #000000;padding:0.097cm;"| '''mystring '''is a variable which stores the word, input by user, during execution.
 |-
@@ Line 376: / Line 370: @@
 | style="border:1pt solid #000000;padding:0.097cm;"| The '''if condition '''checks whether''' '''input string is '''null.'''
-'''-z '''checks whether length of '''string''' is '''zero.'''
+'''- (hyphen) z '''checks whether length of '''string''' is '''zero.'''
-Type '''man test '''on''' terminal '''and explore various '''string '''Or option? Which one are u intending?comparison.
+Type '''man test '''on''' terminal '''and explore various '''string ''' comparison.
 |-
@@ Line 392: / Line 386: @@
 If it does, then this '''echo statement '''will be printed.
-The '''wildcard Pls check if this is correct.'''character '''ensures that any word with''' raj '''in it, will be identified.
+The '''wildcard character '''ensures that any word with''' raj '''in it, will be identified.
 |-
@@ Line 425: / Line 419: @@
 | style="border:1pt solid #000000;padding:0.097cm;"| Come back to our '''terminal.'''
 Type:
-'''Type:'''
 '''ch mod space plus x space multilevel.sh '''
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type''' ./multilevel.sh>> '''Press''' Enter'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| type '''dot slash''' '''multilevel.sh'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type '''dot slash multilevel.sh'''
 |-
@@ Line 460: / Line 450: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| <center>Go to '''./multilevel.sh '''by Pressing''' up arrow key>> '''Press '''Enter'''</center>
-| style="border:1pt solid #000000;padding:0.097cm;"| Let us try executing the script with a different input.
+| style="border:1pt solid #000000;padding:0.097cm;"| Let me clear the prompt.
-Press '''up arrow key.'''
+Let us execute the script again with a different input.
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Enter a Word:'''
-|-
+Type '''abhijit'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type '''abhijit'''
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| I will type '''abhijit.'''
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output: '''“abijit contains word jit”'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The output displayed is '''“abhijit contains word jit”.'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The output is displayed as '''“abhijit contains word jit”.'''
 This shows that the control flowed to the third '''condition''' in our code.
@@ Line 491: / Line 480: @@
 '''Summary'''
 | style="border:1pt solid #000000;padding:0.097cm;"| '''Summary'''
 In this tutorial we learnt, the usage of
-* '''Nested If-else '''with''' Name''' and''' Password verification'''.
+* '''Nested If-else: Name''' and''' Password verification''' and
-−
-* M'''ultilevel if-else, String comparison''' program.
-−
 |-
@@ Line 504: / Line 493: @@
 Assignment
-| style="border:1pt solid #000000;padding:0.097cm;"| Write a program to output different messages when number is
+| style="border:1pt solid #000000;padding:0.097cm;"| As an assignment, write a program to output different messages when number is
 * greater than 3,
@@ Line 510: / Line 499: @@
 * or equal to 3,
 * Or when the user input is empty
 |-

@@ Line 84: / Line 84: @@
 On '''Terminal>> '''Type''' gedit nestedifelse.sh>> '''Press''' Enter'''
-| style="border:1pt solid #000000;padding:0.097cm;"| I have written a '''nestedif '''code in the file''' nestedifelse.sh'''
+| style="border:1pt solid #000000;padding:0.097cm;"| I have written code in the file '''nestedifelse.sh'''
-So, I will go to '''Terminal '''and type '''gedit nestedifelse.sh '''
+I will open it.
-−
-Press''' Enter.'''
 |-
@@ Line 96: / Line 94: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| '''<nowiki>#!/</nowiki>bin/bash'''
-| style="border:1pt solid #000000;padding:0.097cm;"| We already know that this is the first line of '''bash shell''' script - the''' shebang line.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| This is the''' shebang line.'''
 |-
@@ Line 210: / Line 208: @@
-| style="border:1pt solid #000000;padding:0.097cm;"| Now switch to the''' terminal '''and make the file executable by typing -
+| style="border:1pt solid #000000;padding:0.097cm;"| Now open the terminal window by pressing '''ctrl+alt and t''' keys simultaneously on your keyboard.
 '''chmod''' space''' plus x''' space''' nestedifelse.sh '''and press''' Enter.'''
@@ Line 271: / Line 273: @@
-Go to B./'''nestedifelse.sh '''and press '''Enter'''
+Go to ./'''nestedifelse.sh '''and press '''Enter'''
@@ Line 284: / Line 286: @@
 '''Password: 123'''
-| style="border:1pt solid #000000;padding:0.097cm;"| So I will enter the name '''anusha '''and password as '''123.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| So I will enter the name as '''anusha '''and password as '''123.'''
 |-
@@ Line 343: / Line 345: @@
 If''' condition N''' is '''true,''' then''' statement N''' is executed.
-And if''' Condition N''' is '''false,''' then''' statement X''' is executed.
+And if''' Condition N''' is '''false,''' then''' statement X''' will be executed.
 |-
@@ Line 351: / Line 353: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| On '''Terminal>> Type gedit multilevel.sh>> '''Press''' enter'''
-| style="border:1pt solid #000000;padding:0.097cm;"| I have a working example of this code.
+| style="border:1pt solid #000000;padding:0.097cm;"| I have a working example.
-I will open the file''' multilevel.sh''' using the command
+I will open it.
-−
-'''gedit multilevel.sh'''
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"|
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let me explain the code now.
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let us go through the code.
 |-
@@ Line 367: / Line 367: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| '''read -p "Enter a Word : " mystring'''
-| style="border:1pt solid #000000;padding:0.097cm;"| The''' read command''' reads''' one line''' of data from''' standard input.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| '''mystring '''is a variable which stores the word input by user during execution.
-−
-'''-p''' display the '''prompt'''
-−
-'''string''' is a''' variable''' which stores the word input by user during execution'''.'''
 |-
@@ Line 392: / Line 388: @@
 '''echo "$mystring contains word raj"'''
-| style="border:1pt solid #000000;padding:0.097cm;"| The first '''elsif condition '''checks whether''' '''the''' input string''' contains the word''' raj.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| The first '''elsif condition '''checks whether''' '''the''' input string''' contains '''raj.'''
 If it does, then this '''echo statement '''will be printed.
@@ Line 427: / Line 423: @@
 '''>> Type chmod +x multilevel.sh>> Press Enter'''
-| style="border:1pt solid #000000;padding:0.097cm;"| Switch to the '''terminal.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| Come back to our '''terminal.'''
-First make the file executable by typing:''' '''
+'''Type:'''
 '''ch mod space plus x space multilevel.sh '''
@@ Line 438: / Line 435: @@
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type''' ./multilevel.sh>> '''Press''' Enter'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now type '''dot slash''' '''multilevel.sh'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| type '''dot slash''' '''multilevel.sh'''
 |-
@@ Line 457: / Line 454: @@
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output:''' " Nothing is Entered"'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The message “'''Nothing is Entered” '''is displayed.''' '''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The message “'''Nothing was Entered” '''is displayed.''' '''
 And the control comes out of the '''Multilevel if-else statement.'''
@@ Line 463: / Line 460: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| <center>Go to '''./multilevel.sh '''by Pressing''' up arrow key>> '''Press '''Enter'''</center>
-| style="border:1pt solid #000000;padding:0.097cm;"| Now let us try executing the script with a different input.
+| style="border:1pt solid #000000;padding:0.097cm;"| Let us try executing the script with a different input.
 Press '''up arrow key.'''
@@ Line 473: / Line 470: @@
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type '''abhijit'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| I will type '''abijit.'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| I will type '''abhijit.'''
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output: '''“abijit contains word jit”'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The output displayed is '''“abijit contains word jit”.'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The output displayed is '''“abhijit contains word jit”.'''
 This shows that the control flowed to the third '''condition''' in our code.
@@ Line 497: / Line 494: @@
 In this tutorial we learnt, the usage of
-* '''Nested If-else '''with''' Name''' and''' Password verification''' program.
+* '''Nested If-else '''with''' Name''' and''' Password verification'''.
-* M'''ultilevel if-else '''with '''String comparison''' program.
+* M'''ultilevel if-else, String comparison''' program.
@@ Line 512: / Line 509: @@
 * lesser than 3,
 * or equal to 3,
-* user input is empty
+* Or when the user input is empty

@@ Line 388: / Line 388: @@
 '''echo "$mystring contains word raj"'''
-| style="border:1pt solid #000000;padding:0.097cm;"| The first '''elsif condition '''checks whether''' '''the''' input string''' contains the word''' raj.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| The first '''elif condition '''checks whether''' '''the''' input string''' contains the word''' raj.'''
 If it does, then this '''echo statement '''will be printed.
-The '''wildcard Pls check if this is correct.'''character '''ensures that any word with''' raj '''in it, will be identified.
+The '''wildcard '''character ensures that any word with''' raj '''in it, will be identified.
 |-
@@ Line 398: / Line 398: @@
 '''echo "$mystring contains word jit"'''
-| style="border:1pt solid #000000;padding:0.097cm;"| The next '''elsif condition '''checks whether the''' input string''' contains the word '''jit.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| The next '''elif condition '''checks whether the''' input string''' contains the word '''jit.'''
 If it does, then this '''echo statement '''will be printed.
@@ Line 423: / Line 423: @@
 '''>> Type chmod +x multilevel.sh>> Press Enter'''
-| style="border:1pt solid #000000;padding:0.097cm;"| Switch to the '''terminal.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| Come back to our '''terminal.'''
-−
-First make the file executable by typing:''' '''
-−
-'''ch mod space plus x space multilevel.sh '''
-−
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type''' ./multilevel.sh>> '''Press''' Enter'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now type '''dot slash''' '''multilevel.sh'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type '''dot slash''' '''multilevel-ifelse.sh'''
 |-
@@ Line 444: / Line 440: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| '''Enter a Word:'''
@@ Line 453: / Line 448: @@
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output:''' " Nothing is Entered"'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The message “'''Nothing is Entered” '''is displayed.''' '''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The message “'''Nothing was Entered” '''is displayed.''' '''
-And the control comes out of the '''Multilevel if-else statement.'''
+And the control comes out of the '''multilevel if-else statement.'''
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| <center>Go to '''./multilevel.sh '''by Pressing''' up arrow key>> '''Press '''Enter'''</center>
-| style="border:1pt solid #000000;padding:0.097cm;"| Now let us try executing the script with a different input.
+| style="border:1pt solid #000000;padding:0.097cm;"| Let me clear the prompt. Let us execute the script again with a different input.
 |-
@@ Line 473: / Line 463: @@
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output: '''“abijit contains word jit”'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The output displayed is '''“abijit contains word jit”.'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The output is displayed as '''“abijit contains word jit”.'''
 This shows that the control flowed to the third '''condition''' in our code.
@@ Line 489: / Line 479: @@
 '''Summary'''
-| style="border:1pt solid #000000;padding:0.097cm;"| '''Summary'''
+| style="border:1pt solid #000000;padding:0.097cm;"| Come back to our slides.  Let us summarize.
 In this tutorial we learnt, the usage of
-* '''Nested If-else '''with''' Name''' and''' Password verification''' program.
+* '''Nested If-else ''': ''' Name''' and''' Password verification''' and
-* M'''ultilevel if-else '''with '''String comparison''' program.
+* '''Multilevel if-else ''': '''String comparison'''.
@@ Line 503: / Line 493: @@
 Assignment
-| style="border:1pt solid #000000;padding:0.097cm;"| Write a program to output different messages when number is
+| style="border:1pt solid #000000;padding:0.097cm;"| As an assignment, write a program to output different messages when number is
 * greater than 3,
 * lesser than 3,
 * or equal to 3,
-* user input is empty
+* or when the user input is empty
-−
-−
 |-

@@ Line 84: / Line 84: @@
 On '''Terminal>> '''Type''' gedit nestedifelse.sh>> '''Press''' Enter'''
-| style="border:1pt solid #000000;padding:0.097cm;"| I have written a '''nestedif '''code in the file''' nestedifelse.sh'''
+| style="border:1pt solid #000000;padding:0.097cm;"| I have a written code in the file''' nestedifelse.sh'''
-So, I will go to '''Terminal '''and type '''gedit nestedifelse.sh '''
+I will open it
-−
-Press''' Enter.'''
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"|
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let me explain the code now.
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let me explain the code.
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| '''<nowiki>#!/</nowiki>bin/bash'''
-| style="border:1pt solid #000000;padding:0.097cm;"| We already know that this is the first line of '''bash shell''' script - the''' shebang line.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| This is the ''' shebang line.'''
 |-
@@ Line 206: / Line 204: @@
 |-
-| style="border:1pt solid #000000;padding:0.097cm;"| Switch to '''Terminal>> '''Type '''chmod +x nestedifelse.sh>> '''press '''Enter'''
+| style="border:1pt solid #000000;padding:0.097cm;"| Switch to '''Terminal
-| style="border:1pt solid #000000;padding:0.097cm;"| Now switch to the''' terminal '''and make the file executable by typing -
+|-
-'''chmod''' space''' plus x''' space''' nestedifelse.sh '''and press''' Enter.'''
+'''chmod  plus x nestedifelse'''
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Type ./nestedifelse>> '''press '''Enter'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now type '''dot slash nestedifelse.sh''' and press '''Enter.'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now type '''dot slash nestedifelse.sh'''
 |-
@@ Line 248: / Line 252: @@
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type '''abc123'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| I will type the '''password''' as '''abc123'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| I will type '''abc123'''
 |-
@@ Line 271: / Line 275: @@
-Go to B./'''nestedifelse.sh '''and press '''Enter'''
+Go to '''nestedifelse.sh '''
-−
-−
@@ Line 304: / Line 306: @@
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let's execute the script once more.
-This time we will give the name as '''swati '''and press''' Enter.'''
+This time we will give the name as '''swati '''.
 |-
@@ Line 343: / Line 345: @@
 If''' condition N''' is '''true,''' then''' statement N''' is executed.
-And if''' Condition N''' is '''false,''' then''' statement X''' is executed.
+And if''' Condition N''' is '''false,''' then''' statement X''' will be executed.
 |-
@@ Line 351: / Line 353: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| On '''Terminal>> Type gedit multilevel.sh>> '''Press''' enter'''
-| style="border:1pt solid #000000;padding:0.097cm;"| I have a working example of this code.
+| style="border:1pt solid #000000;padding:0.097cm;"| I have a working example.
-I will open the file''' multilevel.sh''' using the command
+I will open it.
-−
-'''gedit multilevel.sh'''
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"|
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let me explain the code now.
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let us go through the code.
 |-
@@ Line 367: / Line 367: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| '''read -p "Enter a Word : " mystring'''
-| style="border:1pt solid #000000;padding:0.097cm;"| The''' read command''' reads''' one line''' of data from''' standard input.'''
+| style="border:1pt solid #000000;padding:0.097cm;"| '''mystring''' is a variable which stores the word input by user during execution.
-−
-'''-p''' display the '''prompt'''
-−
-'''string''' is a''' variable''' which stores the word input by user during execution'''.'''
 |-
@@ Line 382: / Line 378: @@
 '''-z '''checks whether length of '''string''' is '''zero.'''
-Type '''man test '''on''' terminal '''and explore various '''string '''Or option? Which one are u intending?comparison.
+Type '''man test '''on''' terminal '''and explore various '''string ''' comparison.
 |-

@@ Line 78: / Line 78: @@
 On '''Terminal>> '''Type''' gedit nestedifelse.sh>> '''Press''' Enter'''
-| style="border:1pt solid #000000;padding:0.097cm;"| I will open ''an'' already typed program in the file''' nestedifelse.sh'''
+| style="border:1pt solid #000000;padding:0.097cm;"| Let see an example.
-Go to '''Terminal '''and type '''gedit nestedifelse.sh '''
+I have written a nested if code in the file '''nested if-else.sh'''
 Press''' Enter'''
 |-
@@ Line 255: / Line 263: @@
 | style="border:1pt solid #000000;padding:0.176cm;"| Now let us execute the script again.
-Press the up '''arrow key. '''Go to B./'''nestedifelse.sh '''and press '''Enter'''
+Press the up '''arrow key. '''Go to
@@ Line 309: / Line 319: @@
 |-
 | style="border:1pt solid #000000;padding:0.097cm;"| On '''Terminal>> Type gedit multilevel-iflese.sh>> '''Press''' enter'''
-| style="border:1pt solid #000000;padding:0.097cm;"| Let us understand the flow with the help of a bash script
+| style="border:1pt solid #000000;padding:0.097cm;"| Lets look at an example.
-I will open already typed program.
+I have a working example of this code.
-I will open the file''' multilevel-ifelse.sh''' using the command
+I will open the file''' multilevel.sh '''using the command prompt.
-'''gedit multilevel-ifelse.sh '''and Press''' Enter'''
+Now type the code as shown here in your''' multilevel.sh '''file
 |-