DB<3> use Scalar::Util qw(dualvar); DB<4> $v = dualvar 137, 'Buster'; DB<5> p "$v" Buster DB<6> p 0+$v 137 DB<7> p $v++ # read string, increment number Buster DB<8> p $v++ # what...? 138 DB<9> p "$v" 139 DB<10>