vis1982, do you mean to extract lines (as your variable names suggest) or characters from a line within a file within the range specified on the commandline?
    From the reply ABOVE, posted as this was prepared, I think the answer is 'yes.' Do others read it thus?

If characters within a line, you need not only to actually read the file (as Corion mentioned); you need to process the current line... and incrementing $count won't do that for you.

Update: adding code (and subsequently, removing some debug matter)

#!/usr/bin/perl
use strict;
use warnings;
# 848449

=head OP says:
Question is u have a file A
     ACEEWSMKIIWSDJDWKDKEKSSAQWE
and want to extract lines with option 5-10 with output like
     SMKII

## ww reads this as:

I have a file with lines like 
     ACEEWSMKIIWSDJDWKDKEKSSAQWE
     012345678901234567890123456789
     0         1         2
and want to extract characters at positions, 5 .. 9,
where the character position is 0-based.
=cut

if ( $#ARGV < 2 )
{
  print "Usage: extract.pl firstLine lastLine filename\n";
  exit 1;
}

my $start = $ARGV[0];
my $stop  = $ARGV[1];
my $file  = $ARGV[2];
my ($line_elements,  @line_elements);

open (FILE, '<', $file) or die "Can't open file $file $!";

while (<FILE>) {
    my $line = $_;
    my @line_elements = split (//,$line);

    my (@wanted, $wanted);
    for ($start .. ($stop-1) ) {
        push @wanted, $_; 
    }    

    for $wanted(@wanted) {
        for ($line_elements[$wanted]) {
            print "$line_elements[$wanted]";
        }
    }
    print "\n\tNext line in file: \n";
}

[download]

where content of the input file, 848449.3line.txt, exceeds OP's original requirement, and is:

ACEEWSMKIIWSDJDWKDKEKSSAQWE
abcdefghijklxxxxmnop
12345---678xxxx

[download]

where CLI and output is

>perl 848449.pl 5 10 848449.3line.txt
SMKII
        Next line in file:
fghij
        Next line in file:
---67
        Next line in file:

>

[download]
hth.

In reply to Re: print and extract the line by ww
in thread print and extract the line by vis1982

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