I want to nest a for loop in a for loop in a while loop, and I can't even get 
just the first nesting to work yet. Here is the relevant part of my scripting. 



open(XYZ,"$ARGV[0]ready.xyz");
#while (<XYZ>) {
  #chomp($_);
  for ($z = 0, $z <= $#sortedstart, $z++) {
    for ($i = $sortedstart[$z], $i <= $sortedend[$z], $i++) {
      if ($_ =~ /^\s+$i\s+(\D).*\s+(.+\.\d+\s+.+\.\d+\s+.+\.\d+)\s+/) {
        $count++;
        print CON " $count     $count     $1            0     $2\n";
        }
      print "\nz is $z\n";
      print "\ni is $i\n";
      }
    }



I am expecting it to cycle through several $i values and also $z values. When 
it prints the values, it only gives $z=1. 

Does anyone see why this isn't working?
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