In the inventory, the slots are numbered like this:

1______10**
**2______6
3______7**
**15____8**
**4______11
5______12**
**19____13**
**9______14
16 17 18

Get Inventory Item Link

print the name and slot of equipped items

/run for i=0,23 do if GetInventoryItemLink("player",i) then DEFAULT_CHAT_FRAME:AddMessage("Slot "..i..": "..GetInventoryItemLink("player",i)) end end