Thanks.Yep, I tried $_ =~ s/\r\n//g; $seq{$chr} = join ("", $_); already but it does nt concatenate as expected .Below is my code: 

while (<IN>) {
        chomp;
        if (/^>chr(\S*)$/) {
        $chr = $1;
        #print STDERR "[$chr]\n";
        }
        else {
        chomp $_;
        $_ =~ s/\s\r\n\t//g;
        $seq{$chr} = join ("",$_);
        #$seq{$chr} = `perl -pe 'chomp; END {print "\n" }' $file`;
        #$seq{$chr} .=  $_;
        print "$seq{$chr}\n";
        }
        #print OUT "$seq{$chr}\n";
}

[download]

Thanks

In reply to Re^2: concatenating multiple lines without using . operator by anonym
in thread concatenating multiple lines without using . operator by anonym

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