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Negating a number

by flamey (Scribe)
on Mar 04, 2009 at 17:10 UTC ( [id://748242]=perlquestion: print w/replies, xml ) Need Help??

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  1. or download this
    $p = 7;
$n = -$p;        # or 0 - $p
print $n;        # -7
printf "%x", $n; # FFFFFFF9
  2. or download this
    $p = 7;
$n = $p ^ 0xFFFF_FFFF; # im on 32-bit winxp system
printf "%x", $n; # FFFFFFF8

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