<%hash = (%hash, e => 'f', g => 'h', i => 'j'); <%hash = (%otherhash, %hash); #### my %hash1 =qw/ One 1 Two 2 Three 3/; my %hash2 =qw/ Four 4 Five 5 Six 6/; %hash1 ,= %hash2; say keys %hash1;