Why Isn't My Code Doing What I Want It To Do?

I got this really simple piece of code but it isnt doing what i want it to do >.<

it gets items, then places above how many items are put in its inventory

while true do
  turtle.select(1)
  num = turtle.getItemCount(1)
    for i = 1, num do
  turtle.placeUp()
  end
end

Okay… well what is it doing wrong?

You can't place more than one block in the same location. Do you want it to move forward as well? You'll have to tell it to do that.

ok…lyqyd, you solved my problem in your question hahaha… it was doing a place command, not a drop command…its fixed