A little new to perl and having a problem printing out the keys. Everything else in the script works fine. Does it have something to do with the fact that I'm using the default variable when I create the hash? 
use strict;
use warnings;

my $string = 'Return code is';
my $filename = 'trace.Discovery';
my %errors =();
my $total = 0;

if (open(my $fh, '<:encoding(UTF-8)', $filename)) {
  while (my $row = <$fh>) {
    chomp $row;
    if ($row =~ /\Q$string\E/) {
      my $digit =  (split /\:/, $row)[-1];
      $errors{$digit}++;
      }
  }
} else {
  print "Could not open file '$filename'\n";
  warn "This is the error --> $!";
}

# First attempt to print keys
foreach ( sort keys %errors ) {
        print "$_ - $errors{$_}\n";
        $total = $total + $errors{$_};
}
        print "Total errors --> $total\n";

### Another attempt to print the keys.
while( my( $key, $value ) = each %errors ){
    print "$key: $value\n";
}

[download]
Current script output.
- 1889
- 642
- 5
- 17
Total errors --> 2553
: 17
: 5
: 642
: 1889

In reply to Can't get hash keys to print by Daren

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