use strict;

my %hash = {};

print "\%hash=".%hash."\n";
print "scalar(\%hash)=".scalar(%hash)."\n";
print "length(\%hash)=".length(%hash)."\n";
%hash = undef;
print "defined(\%hash)=".defined(%hash)."\n";

##</code><code>##

%hash=1/8
scalar(%hash)=1/8
length(%hash)=3
defined(%hash)=1