Help for this page
$ perl -MDevel::Peek -wle '$x=12345; print Dump $x; print "$x"; print +Dump $x' SV = IV(0x1004f958) at 0x1004f958 ... PV = 0x10040c08 "12345"\0 CUR = 5 LEN = 8
$x="12345.67"; $y=$x+1;