I have in the past written some loops backward (like if) but they were all while or until loops. I have just recently be forced to take a perl class, so to keep myself amused I am trying to get a better grasp of perl's more unique syntax.
I have written $product *= $number for($number;$number >0;$number--);. Yes, this is supposed to be calculating factorial, but it tosses a syntax error at ($number. So I was wondering if for is not compatible with this syntax (google is pulling a scant few useful links, at least none using for in this manner)?

This is my entire program, any way to make the syntax more uniquely perl like would be greatly apprecated as this is how I learn best. 
my ($product,@values);

@values = (7,38,44,2,0);

foreach my $number (@values)
 {
  unless($number == 0)
   {
    print $number;
    $product *= $number for($number;$number >0;$number--);
    print " Factorial is $product\n";
   }
  else { print "0 Factorial is 1\n"; }
 }

exit(0);

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In reply to back iffing with for? by Anonymous Monk

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