####################################################################
##                               MAIN
####################################################################

my $contiguous_characters_length = <>;

chomp $contiguous_characters_length;

my $sequence_1 = 'qwertyuiop';

for (my $i = 0; $i < length $sequence_1 ; $i++) {

  my $results = substr ($sequence_1, $i-($contiguous_characters_length
+-1), $contiguous_characters_length);

  print "$results\n";

}

exit;

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The code is flawed in that if you input length 4 it returns:

iop op p qwer wert erty rtyu tyui yuio uiop

And I don't want first three lines. (If length is 3 I don't want first two lines etc.) Could you help me solve this problem? Where's the bug in the for loop? This is essential for further BLAST analysis, if anyone wonders why I need that program:)

In reply to Contiguous characters BLAST by etheral

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