Hello, another single-pass approach, which uses the fact that you know the questions and their point "weights" in advance is to form questions into a Lua table and evaluate the total first: ---- local C = context local tab = { {"Question 1", 10, }, {"Question 2", 20, }, {"Question 3", 30, }, } local n = 0 for _, v in ipairs(tab) do local q, n1 = unpack(v); n = n + n1 end -- Or: for _, v in ipairs(tab) do n = n + v[2] end local f = function(it) local q, n1 = unpack(it) n = n + n1 C(q .. ": " .. n) C.par() end C.starttext() C("Total score: " .. n) C.par() n = 0 -- Reset f(tab[1]) f(tab[2]) f(tab[3]) -- Or: for _, v in ipairs(tab) do f(v) end C.stoptext() ---- Best regards, Lukas

Thanks for the response. I am looking at something like this:

============== \starttext \directlua{total = 0} \title{Homework 1}

Total score: \directlua{tex.print(total);}

Question 1 (3 points) \directlua{total = total + 3}

Question 2 (4 points) \directlua{total = total + 4}

Question 3 (5 points) \directlua{total = total + 5}

\stoptext ==============

I expect the “Total score” to be followed by “12”, but I don't know how to get that (or whether that is even possible).

Thanks.

Kumar

-- Ing. Lukáš Procházka | mailto:LPr@pontex.cz Pontex s. r. o. | mailto:pontex@pontex.cz | http://www.pontex.cz Bezová 1658 147 14 Praha 4 Tel: +420 241 096 751 Fax: +420 244 461 038

On Mon, Apr 13, 2015 at 03:32:04PM +0200, Hans Hagen wrote:

On 4/13/2015 1:53 PM, Kumar Appaiah wrote:

...

Hi.

I am trying to set up a system where I can use Lua to find a total that I can display at the end. For example, if I set a question paper, after each question, I do a \directlua{total = total + 4}, assuming this question has 4 points. At the top of my document, I now want to say "Total points:" and display the value of total.

Now, naturally, using \directlua gives me 0, since total is 0 at the beginning. But \latelua didn't seem to be what I am looking for. Could someone please guide me in the right direction?

forget about latelua ... by the time that kicks in typesetting is done already .. you need to go multipass:

\starttext

\startluacode local name = nil local temp = 0

function document.startwhatever(s) name = s temp = 0 end function document.addwhatever(n) temp = temp + n context(n) end function document.stopwhatever() job.variables.save("document:temp:"..name,temp) end function document.getwhatever(s) context(job.variables.collected["document:temp:"..s]) end \stopluacode

\def\startwhatever[#1]{\ctxlua{document.startwhatever("#1")}} \def\stopwhatever {\ctxlua{document.stopwhatever()}} \def\addwhatever #1{\ctxlua{document.addwhatever(#1)}} \def\getwhatever #1{\ctxlua{document.getwhatever("#1")}}

total: \getwhatever{foo}

\startwhatever[foo]

test 1: \addwhatever{10}\par test 2: \addwhatever{20}\par test 3: \addwhatever{30}\par

\stopwhatever

\stoptext

Thanks Hans. This is what I needed! Kumar -- Kumar Appaiah