FBA The Creator

Ok after someone else mentioned doing a calculator i thought i'd have a go but it's proving difficult.
I have my user interface and I'm collecting numbers as pressed and I'm trying to do this with numerical variables e.g.

num = num * 10 + keypressed

to build up my integer then

num = num + keypressed/10 * count

to build up the fraction after the decimal place

Anyway I'm sure it would be a lot easier to collect and append characters in a string and then evaluate it all to a number at the end.

Is there an expression where I can add say "1" + "2" + "3" and it becomes "123" rather than being immediately treated as numbers and becoming 6 ?

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You have to use the LUA string concat operator:

..

instead of sum operator.

For example:

debug(1+2)
-- this will output: 3

debug ("1".."2")
-- this will output: "12"

a="hi"
b="to all"
debug(a .. " " .. b)
-- this will output: "hi to all"

excellent thanks I'll try that later

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