startup.lua:18: unexpected symbol

[mawlwurst]

First time on the forum so I probably messed something up, but I ran into an error which I couldn't find an answer for. It is odd because everything I found about it has near 'something' included in the error message. Here's the code

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local counter = 0
local novicecounter = 0
local mastercounter = 0
function down()
    local x, t = turtle.inspectDown()
    while t.name ~= 'minecraft:bedrock' do
        turtle.digDown()
        turtle.down()
    end
end
function up()
    while counter < 75 do
        turtle.digUp()
        turtle.up()
        counter = counter + 1
    end
end 
while mastercounter ~= do
    while novicecounter ~= 16 do
        down()
        turtle.digForward()
        turtle.forward()
        up()
        novicecounter = novicecounter + 1
    end
    turtle.turnLeft() 
    turtle.turnLeft()
    mastercounter = mastercounter + 1
end
https://pastebin.com/zriwvdNL if the codeblock didn't work.

[Lupus590]

On line 18 you have

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while mastercounter ~= do you are missing something to compare mastercounter to.

[mawlwurst]

Oh I don't know how I didn't see that, thank you