ans  =
 
    1.  
 
-->exec('Example3.sci')
 
-->clear
 
-->flag=1
 flag  =
 
    1.  
 
-->mode(-1)
Current date is 11-Jun-2013 
 
Welcome to the Textbook Companionship Project 2013 
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 Book Title                             :       UNIX CONCEPTS AND APPLICATIONS    
 
 Book Edition                         :                                                                           4   
 
 Book Author                          :                                                    Sumitabha Das   
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 Code Author                          :                                                     Pranav Bhat T   
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 Chapter Number                    :                                                                            19   
 
 Chapter Title                         :                  perl-THE MASTER MANIPULATOR   
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Example 3    :               Show the method of using default variables in perl using 
		mailbox specific extraction as an example 
 
 ****************************************************************   
 
 Answer    :      
 
 INSTRUCTIONS   :    

1. Here all instructions are preloaded in the form of a demo

Initially the whole perl script is displaying and then 
 the result of the same can be seen in the command line interpreter.
2. PLEASE MAKE SURE THAT THE PERLSCRIPT INTERPRETER
EXISTS IN THE SYSTEM
OR THE COMMAND WOULD NOT WORK 

3. THIS IS POSSIBLE ONLY IF THE HOME DIRECTORY CONTAINS MAILBOX PATH
4. PRESS ENTER AFTER EACH COMMAND to see its RESULT
5. PRESS ENTER AFTER EACH RESULT TO GO TO THE NEXT COMMAND
.............Press [ENTER] to continue.....	UNIX SHELL SIMULATOR(DEMO VERSION WITH PRELOADED COMMANDS)



# Enter the name of the perlscript file whichever you desire  

  #!/usr/bin/perl
# Script: hither.pl - Extracts the From: headers from the mailbox
#
while(<>) {                                                  # Actually ($_ = <>) 
         chop()   ;                                             # chop($_)
         if  ( /From:.*\@velvet.com/)  {         # if ($_ =~ /From:.*\@velvet ...) 
         $slno++  ;
          print($slno  .  "  " . $_  .  "\n")   ;
  }  } 

# type the following command in the command line interpreter as soon as it appears 
       " perl hither.pl    [MAILBOX PATH AS COMMANDLINE ARGUMENT] "[ENTER]


$ perl hither.pl  [MAILBOX PATH-CMDLINE ARGUMENT]          #to execute the perlscript 


   ---------------->Executing PerlScript in Command Line Prompt<-------------- 


$ exit        #To exit the current simulation terminal and return to Scilab console

........# (hit [ENTER] for result)

			BACK TO SCILAB CONSOLE...
Loading initial environment 
-->diary(0)