use 5.014; use strict; use Devel::Peek; my $x = 'not a number'; say 0 + $x; Dump $x; __END__ 0 SV = PVNV(0x1b87050) at 0x1ba83b8 REFCNT = 1 FLAGS = (PADMY,POK,IsCOW,pIOK,pNOK,pPOK) IV = 0 NV = 0 PV = 0x1bafe30 "not a number"\0 CUR = 12 LEN = 14 COW_REFCNT = 1