[LUA][Error] 'then' expected

Hi! Im trying to make a program for booking rooms like in hotels.
I want to make it check if the room´s booked or not and if its booked do one thing and if its not booked do another thing..
But when i try to run it i get this error message: bios:388: [string "startup"]:29: 'then' expected
I've tried to figure out how to fix it but i cant find any information on it …
Please help me.
Well.. anyways heres the script:

room1 = false
room2 = false

function start()
term.clear()
term.setCursorPos(1,1)
print("[1] Booking")
term.setCursorPos(1,2)
print("[2] Unbooking")
term.setCursorPos(1,3)
write("Input number: ")
local input = read()
if input == "1" then
book()
elseif input == "2" then
unbook()
else
start()
end
end

function book()
term.clear()
term.setCursorPos(1,1)
print("Booking")
term.setCursorPos(1,2)
write("What room would you like to book?: ")
local input = read()
if input == "1" and (room1) = false then
term.clear()
term.setCursorPos(1,1)
print("debug")
end
end

start()

Simple mistake, happens to me quite a lot, too:

if input == "1" and (room1) = false then

has to be

if input == "1" and (room1) == false then

(double "=" )

Hope that helped :D/>

not room1

is better than

room1 == false

Unless you REALLY want 'false', because if room1 is nil, (not room1) still evaluates true

I just can't believe that half of the programmers on this forum have never heard about or can't use 'boolean' properly…

Ah. Thanks for The help!

LBPHacker, on 12 March 2013 - 10:30 AM said:

not room1

is better than

room1 == false

Unless you REALLY want 'false', because if room1 is nil, (not room1) still evaluates true

I just can't believe that half of the programmers on this forum have never heard about or can't use 'boolean' properly…

There is an advantage to using direct boolean checking, take this example

local function someFunc( someVar )
  if not someVar then
    print( [[You supplied boolean 'false']] )
  end
end

that would have problems with

someFunc('hello')

So in this case using

if someVar == false then

would be better evaluation… it is one disadvantage to Lua not forcing types.