Prepend '0x' to the string and it will maintain its numeric value. 
#!/usr/bin/perl

  use strict;
  no warnings 'numeric';

  my $this = sprintf("0x%x", 40);
  my $that = sprintf("0x%x", 2);

  my $other = $this + $that;

  printf "$other %x\n", $other;

__END__
42 2a

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Update: Added no warnings for the -w happy...

Update: This is perl, v5.6.0 built for i386-linux

In reply to Re: Hex Question(s) by YuckFoo
in thread Hex Question(s) by deadlock

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