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Hakz_Studioz

If then loop error

Question

Can you please help tell me what I did wrong in my if then loop? Thank you, and have a good day

Here’s the code (by the way,I’m using a microcontroller): 

local rs  = component.proxy(component.list(“redstone”)())

Local wr = component.proxy(component.list(“modem”)())

 

wr.open(2110)

local x,w,a,d,f,sent = computer.pullSignal()

rs.setOutput(3,100)

#output to front

while true do

if sent = “enon” then

rs.setOutput(3,100)

elseif sent = “enoff” then

rs.setOutput(3,0)

elseif computer.energy() < 150 then

rs.setOutput(3,0)

end

end

the error was “failed loading bios: bios:8: then expected near =“

where exactly?

Again, thank you.

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2 answers to this question

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local rs  = component.proxy(component.list(“redstone”)())
Local wr = component.proxy(component.list(“modem”)()) --[[
^ capital letter not allowed! Use 'local' ]]

wr.open(2110)

local x,w,a,d,f,sent = computer.pullSignal()

rs.setOutput(3,100)

#output to front --[[
^ this is a shell comment - lua will try (and fail) to parse this!
Learn about Lua comments here: https://www.lua.org/pil/1.3.html ]]

while true do
  if sent = enon then --[[
          ^ here you've missed the distinction between '=' and '=='. 
          While '=' is an assignment operator (such as "local a = 4") then '==' is an equality expression (such as "if sent == 'enon'")
          The distinction is made to prevent you from accidentally doing one when you meant the other. ]]
    rs.setOutput(3,100)
  elseif sent = enoff then --[[
              ^ don't forget to fix this one too ]]
    rs.setOutput(3,0)
  elseif computer.energy() < 150 then
    rs.setOutput(3,0)
  end --[[
  ^ you were missing an 'end' here but it was hard to tell until I added indentation. 
  Giving the program some shape makes it easier to spot grammatical mistakes like these ]]
end

-- I've also removed a lot of the whitespace between each of your lines of code. Bringing it closer together makes it easier to comprehend.

I've taken your code, changed the whitespace a little and annotated it with all the mistakes I spotted.

Hopefully you'll be able to fix up the code yourself!

Also something to beware when pasting code raw - the forum exchanges some symbols to make them more aesthetically pleasing, but this breaks your code - use the "code" button in the editor instead!

 

Hope this helps

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