in reply to How to get hexadecimal output in specific format?

my $hex = sprintf "%08X", $dec;

It is all in the docs

$ perldoc -f sprintf
:
%X    like %x, but using upper-case letters
:
0     use zeros, not spaces, to right-justify

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Enjoy, Have FUN! H.Merijn

In Section Seekers of Perl Wisdom