while (<FILE>) { #containing the above information

chomp;

my @temp_array = split(/\t/,$_);

for (1 .. 2) { #arbitary number based on outside factor

my $pop_tracker = $_;

if ($temp_array[0] == $pop_tracker) {

print $temp_array[0]; #I want this to only print once.

#more print statements here to reflect the below output.

}
}

# I want: 1 - 300 1_a 30 1_b 20
                  2_a 22 2_b 12
              320 1_a 10 1_b 30
                  2_a 32 2_b 22
#         2 - you get the idea...

#Not:     1 - 300 1_a 30 1_b 20
          1 - 300 2_a 22 2_b 12
          1 - you get the idea...
          1 - some info
          2 - some info
          2 - some info
          2 - some info
          2 - some info