I want to stop the loop at "until robot.durability()" if slot 1 on the robot is empty.
Can I do 'until robot.durability() or if not getStackInInternalSlot()' ?
Also, is there an easier way to select and drop the content of slot 2 to 11 ?
Thank you so much for your help. Almost done with this program.

local function checkTool()
        if not robot.durability() then
              robot.select(2)
              robot.drop()
              robot.select(3)
              robot.drop()
              robot.select(4)
              robot.drop()
              robot.select(5)
              robot.drop()
              robot.select(6)
              robot.drop()
              robot.select(7)
              robot.drop()
              robot.select(8)
              robot.drop()
              robot.select(9)
              robot.drop()
              robot.select(10)
              robot.drop()
              robot.select(11)
              robot.drop()
              robot.select(17)
              robot.transferTo(2)
              c.craft(1)
        until robot.durability()