In addition... fantastic for passing named parameters - without concern for their order:

   connect(PW=>'poof!', IP=>'10.102.102.13', USER=>'bob');

   sub connect {
      # log in to $args{IP} as "$args{USER}/$args{PW}"
      # note default IP can be overridden
      %args = ( IP => '192.168.1.100',
                @_
      );
      ...
   }
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