Printing a int as hex

[Dr Manhattan]

Hi monks

I'm having some trouble in printing a hash value (normal integer) as a hexadecimal value. This value has to be small caps, and 2 digits long

When I do a simple script like this to test the code:

my %hash;

$hash{a}{key} = 7;
$hash{b}{key} = 10;
$hash{c}{key} = 11;
$hash{d}{key} = 12;
$hash{e}{key} = 13;

foreach my $x (keys %hash)
{
    printf "%02x\n", $hash{$x}{key};
}

-it works perfectly fine

In the example code I try to print a hash value(which is a normal integer) as a hex value. I am using the printf and hex functions, but somehow I get stuck. For instance if my hash value is 10, I want the output to be 0a. All I get back though is normal ints.

Thanks in advance for any help, much appreciated

Update

But when I try to implement that in my real script, it does not work

    
foreach my $id (sort keys %hash)
    {
        printf Out "%02x\n", $hash{$id}{"counter"};
    }

Somehow it filters out all values larger than 10 from my output. This is strange because the code is the same...