scalar(%hash) gives zero

[Kenneth Lee]

My script has these lines in it,

  my %in; CGI::ReadParse(\%in);
  print scalar(%in);
  print %in;

Then I run it under shell,

  bash$ ./myscript.pl foo=1 bar=2

It gives me 

  0foo1bar2

Can anyone explain why the "0" but not the bucket usage?

Kenneth

PS. I'm using 5.6.0 with mod_perl/1.22