perl -MDevel::Peek -we '@f = (1.20 => "1.2"); Dump $f[0]; Dump $f[1]'
SV = NV(0x88238e8) at 0x87fc230
  REFCNT = 1
  FLAGS = (NOK,pNOK)
  NV = 1.2
SV = PV(0x87f9044) at 0x87fc424
  REFCNT = 1
  FLAGS = (POK,pPOK)
  PV = 0x8806fc8 "1.2"\0
  CUR = 3
  LEN = 4