View difference between Paste ID: ciE59T34 and BqYXcRdn

 args = {...}
 width = args[1];
 length = args[2];
 height = args[3];
 
 if width==nil then
 	error("Width not specified");
 end
 if length==nil then
 	error("Length not specified");
 end
 if height==nil then
 	error("Height not specified");
 end
 
 turtle.turnRight();
 for i=0, width/2-1, 1 do
 	--Assuming that we were put in the centre of one side of the bottom of the cube
 	-- move to the side of the cube to start.
 	turtle.dig();
         while not turtle.forward() do
             turtle.dig()
         end
 end
 turtle.turnLeft();
 
 
 function mineRow(num)
     for i=0, num, 1 do
 	print("depth = " .. i);
 	--Dig infront of you.
         while turtle.detect() do
             turtle.dig()
         end
 	--dig infront of you if you can't move forward.
         while not turtle.forward() do
             turtle.dig()
         end
     end
 end
 
 function digPlane(x, y)
 	for i=0, y, 1 do
 		print("width = " .. i);
 		--Mine 1 row
 		mineRow(x/2);
 		turtle.turnLeft();
 		--Else turn around and get ready for the next one.
 		mineRow(0);
 		turtle.turnLeft();
 		--Mine 1 row
 		mineRow(x/2);
 		turtle.turnRight();
 		--Exit if we've finished this area.
 		i = i + 1
 		print("width = " .. i);
-		if i+1 >= y then
+		if tonumber(i+1) >= tonumber(y) then
 			break
 		end
 		--Mine column a little
 		mineRow(0);
 		turtle.turnRight();
 	end
 	--Turn around and get ready for the next plane.
 	turtle.turnRight();
 	mineRow(1);
 end
 
 function digCube(x, y, z)
 	print(x)
 	print(y)
 	print(z)
 	for i=0, z, 1 do
 		print("height = " .. i);
 		digPlane(x, y);
 		--Dig above you
 	        while turtle.detectUp() do
 	            turtle.digUp()
 	        end
 		--Move up
 	        while not turtle.up() do
 	            turtle.digUp()
 	        end
 	end
 end
 
 digCube(length, width, height);