How to script the control logic of air conditioner?

[Joep]

value = event.getvalue()

if value > 0 and value < 10 then
--do something
elseif value > 10 and < 25 then
--do something
elseif value < 25 then
--do something
end

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You can also use >= 10 instead of > 10 for example.
In the first example also the value 10 itself is included in the second example only every value higher then 10.