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Hakz_Studios

I need help with my If-Then commands

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I need help with my autorun.lua program It won’t take my If-then statements what am I doing wrong?

(I am using Computronics)

Here is the program

— local require commands start

local component= require (“component”)

local sides = require(“sides”)

local rs = component.redstone

local event = require(“event”)

local os = require(“os”)

— local  require commands end

— Main function start

local function main()

local username.message = event.pull(“chat_message”)

—problematic loop start

if (username = “Hakz_Studios” and message = “ Alice Refuel”) then

component.speech_box.say(“Refueling”)

component.chat_box.say(“Refueling”)

repeat

local username,message = event.pull(“chat_message”)

rs.setoutput(sides.bottom)

untill username= “Hakz_Studios” and message = “Stop Refueling”

— restarting function

function main()

elseif username = “Hakz_Studios” and message = “Stop Refuel Systems”

os.execute(“Shutdown”) 

else function main()

—problematic loop end 

end

— main function end

Sorry If I had many mistakes I just started Coding Today and Thanks in advance

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Hey,

in these if statements, you need to use relational operators. Since you want to see if you're variable is equal to a certain string, you need the '==' (two equal signs).

So you're code would look like this

-- local require commands start

local component= require (“component”)

local sides = require(“sides”)

local rs = component.redstone

local event = require(“event”)

-- local os = require(“os”)	remove this, the os lib does not need to be required, I think

-- local  require commands end

-- Main function start

local function main()

  local username, message = event.pull(“chat_message”)	-- you head a period (.) between both variables

  -- problematic loop start

  if username == Hakz_Studios and message ==  Alice Refuel then

  component.speech_box.say(“Refueling”)

  component.chat_box.say(“Refueling”)

  repeat

    local username,message = event.pull(“chat_message”)

    rs.setoutput(sides.bottom, 15)	-- you need to give the redstone output a value, otherwise it wont turn on
    -- also, by putting it into a loop, the redstone output will be set a ton of times
    -- it helps putting the statement before the repeat until loop

  until username == Hakz_Studios and message == Stop Refueling

  -- restarting function

function main() -- idk what is this line about, but i dont think it belongs here

  elseif username == Hakz_Studios and message == Stop Refuel Systems

  os.execute(“Shutdown”) -- it will look for a program called 'Shutdown' with a capital S

  else
    function main() -- also, dont know what you want to do here, do you want to start the function again (to have the code repeated endlessly)
  --problematic loop end 
  end

-- main function end
end

Some small info: you don't have to put brackets around your condition in the if-statements, you can, but it's not necessary.

Also, here is a program that repeats the main loop over and over again, as I think that is what you want to do in your original code, if I'm wrong tho and misinterpreting you're code, just ignore my suggestion:D

-- require libs

local component = require("component")
local rs = component.redstone
local sides = require("sides")
local event = require("event")

-- main function

local function main()
  local username, message = event.pull("chat_message")
  if username == "Hakz_Studios" and message == "Alice Refuel" then
    component.speech_box.say("Refueling")
    component.chat_box.say("Refueling")
    -- this time I set the redstone output once, and then wait for the message 'Stop refueling' then deactivate the redstoneoutput again
    rs.setOutput(sides.bottom, 15)
    repeat
      username, message = event.pull("chat_message")
      -- you dont have to use 'local' in front of username and message here, since you already created these variables at the top of the main function
      -- it will override these values but it actually doesnt matter since from this part you will skip to the end and these initial values for both variables
      -- wont be needed anymore
    until username == "Hakz_Studios" and message == "Stop Refueling"
    rs.setOutput(sides.bottom, 0)	-- I assume you want to deactivate the redstone after you're done refueling
    
  elseif username == "Hakz_Studios" and message == "Stop Refuel System" then
    os.execute("Shutdown")	-- again, this will start the program "Shutdown" with a capital "S"
  end
  	-- as you can see, we skip the last else statement, as it will call the main function recursively, resulting in a overflow error pretty fast
  	-- you could get away with returning a call to the main function, but this wouldnt be good practice eiter, I guess
end

-- we add a last while loop, which will repeat endlessly calling the main function

while true do
  main()
end

I hope this helps.

Also you did great for your first shot at programming!

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I have a question why type 3 ends? I am thinking one ends the loop,another ends the main function and the last ends the program. Am I right? And it gave me this error:/lib /process.lua:52: /home/autorun.lua:18: syntax error near ‘username’:

stack traceback:

|C|: in function ‘assert’

/lib/process.lua:52: in function </lib/process.lua:35> 

(...tail calls...)

[C]: in function ‘xpcall’

machine:791: in function ‘xpcall’

/lib/process.lua:63: in function </lib/process.lua:59>

Help!

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16 hours ago, Hakz_Studios said:

I have a question why type 3 ends? I am thinking one ends the loop,another ends the main function and the last ends the program. Am I right?

In what piece of code you have 3 ends? I only find 3 ends in the last program I posted. There you have one end for closing the main function (2nd end), one for closing the if-statement (1st end) and the last end is for closing the while loop.

And for the error:

First it would be good if you could post the actual screenshot.

Second,  could you post the code of the program you were running?

From what I currently see, there‘s propably a typo in line 18, but I can‘t tell exactly, what is wrong until I see the actual code.

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