Perform and show arithmetic with LuaLaTeX
The function I'm trying to create is one that takes two numbers and prints the result with some math. The following is my code:
documentclass[12pt,a4paper]{article}
begin{document}
directlua{
function prod(a,b)
tex.print(a "$times$" b "$=$" a*c)
end
}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
I can't make it print the whole statement correctly. How to solve it?
luatex calculations
add a comment |
The function I'm trying to create is one that takes two numbers and prints the result with some math. The following is my code:
documentclass[12pt,a4paper]{article}
begin{document}
directlua{
function prod(a,b)
tex.print(a "$times$" b "$=$" a*c)
end
}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
I can't make it print the whole statement correctly. How to solve it?
luatex calculations
3
Trytex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
– moewe
Apr 5 at 19:32
1
Unlike TeX, to which everything is (by default) a token to be typeset so you can simply write "hello world" and have those words appear in the typeset output, Lua is a general-purpose programming language in which something likea b
is a syntax error (assuminga
andb
are variables). Here,tex.print
is a Lua function that takes a single string as input, so you need to give it a single string. (There are other forms oftex.print
too, that you can read in the LuaTeX manual, but those are probably not what you want.) Lua uses..
to concatenate strings.
– ShreevatsaR
Apr 5 at 19:39
2
BTW instead of concatenating different strings with..
, you can also usestring.format
to build a string, e.g. in a filetest.lua
putfunction prod(a,b) tex.print(string.format([[$%d times %d = %d$]], a, b, a*b)) end
and in your file dodirectlua{dofile('test.lua')}
-- here the[[
instead of"
is to avoid needing to escape the backslash intimes
.
– ShreevatsaR
Apr 5 at 19:46
@ShreevatsaR Thanks for that option!
– Levy
Apr 5 at 20:10
add a comment |
The function I'm trying to create is one that takes two numbers and prints the result with some math. The following is my code:
documentclass[12pt,a4paper]{article}
begin{document}
directlua{
function prod(a,b)
tex.print(a "$times$" b "$=$" a*c)
end
}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
I can't make it print the whole statement correctly. How to solve it?
luatex calculations
The function I'm trying to create is one that takes two numbers and prints the result with some math. The following is my code:
documentclass[12pt,a4paper]{article}
begin{document}
directlua{
function prod(a,b)
tex.print(a "$times$" b "$=$" a*c)
end
}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
I can't make it print the whole statement correctly. How to solve it?
luatex calculations
luatex calculations
edited Apr 5 at 20:18
Mico
286k32390779
286k32390779
asked Apr 5 at 19:23
LevyLevy
447312
447312
3
Trytex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
– moewe
Apr 5 at 19:32
1
Unlike TeX, to which everything is (by default) a token to be typeset so you can simply write "hello world" and have those words appear in the typeset output, Lua is a general-purpose programming language in which something likea b
is a syntax error (assuminga
andb
are variables). Here,tex.print
is a Lua function that takes a single string as input, so you need to give it a single string. (There are other forms oftex.print
too, that you can read in the LuaTeX manual, but those are probably not what you want.) Lua uses..
to concatenate strings.
– ShreevatsaR
Apr 5 at 19:39
2
BTW instead of concatenating different strings with..
, you can also usestring.format
to build a string, e.g. in a filetest.lua
putfunction prod(a,b) tex.print(string.format([[$%d times %d = %d$]], a, b, a*b)) end
and in your file dodirectlua{dofile('test.lua')}
-- here the[[
instead of"
is to avoid needing to escape the backslash intimes
.
– ShreevatsaR
Apr 5 at 19:46
@ShreevatsaR Thanks for that option!
– Levy
Apr 5 at 20:10
add a comment |
3
Trytex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
– moewe
Apr 5 at 19:32
1
Unlike TeX, to which everything is (by default) a token to be typeset so you can simply write "hello world" and have those words appear in the typeset output, Lua is a general-purpose programming language in which something likea b
is a syntax error (assuminga
andb
are variables). Here,tex.print
is a Lua function that takes a single string as input, so you need to give it a single string. (There are other forms oftex.print
too, that you can read in the LuaTeX manual, but those are probably not what you want.) Lua uses..
to concatenate strings.
– ShreevatsaR
Apr 5 at 19:39
2
BTW instead of concatenating different strings with..
, you can also usestring.format
to build a string, e.g. in a filetest.lua
putfunction prod(a,b) tex.print(string.format([[$%d times %d = %d$]], a, b, a*b)) end
and in your file dodirectlua{dofile('test.lua')}
-- here the[[
instead of"
is to avoid needing to escape the backslash intimes
.
– ShreevatsaR
Apr 5 at 19:46
@ShreevatsaR Thanks for that option!
– Levy
Apr 5 at 20:10
3
3
Try
tex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
– moewe
Apr 5 at 19:32
Try
tex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
– moewe
Apr 5 at 19:32
1
1
Unlike TeX, to which everything is (by default) a token to be typeset so you can simply write "hello world" and have those words appear in the typeset output, Lua is a general-purpose programming language in which something like
a b
is a syntax error (assuming a
and b
are variables). Here, tex.print
is a Lua function that takes a single string as input, so you need to give it a single string. (There are other forms of tex.print
too, that you can read in the LuaTeX manual, but those are probably not what you want.) Lua uses ..
to concatenate strings.– ShreevatsaR
Apr 5 at 19:39
Unlike TeX, to which everything is (by default) a token to be typeset so you can simply write "hello world" and have those words appear in the typeset output, Lua is a general-purpose programming language in which something like
a b
is a syntax error (assuming a
and b
are variables). Here, tex.print
is a Lua function that takes a single string as input, so you need to give it a single string. (There are other forms of tex.print
too, that you can read in the LuaTeX manual, but those are probably not what you want.) Lua uses ..
to concatenate strings.– ShreevatsaR
Apr 5 at 19:39
2
2
BTW instead of concatenating different strings with
..
, you can also use string.format
to build a string, e.g. in a file test.lua
put function prod(a,b) tex.print(string.format([[$%d times %d = %d$]], a, b, a*b)) end
and in your file do directlua{dofile('test.lua')}
-- here the [[
instead of "
is to avoid needing to escape the backslash in times
.– ShreevatsaR
Apr 5 at 19:46
BTW instead of concatenating different strings with
..
, you can also use string.format
to build a string, e.g. in a file test.lua
put function prod(a,b) tex.print(string.format([[$%d times %d = %d$]], a, b, a*b)) end
and in your file do directlua{dofile('test.lua')}
-- here the [[
instead of "
is to avoid needing to escape the backslash in times
.– ShreevatsaR
Apr 5 at 19:46
@ShreevatsaR Thanks for that option!
– Levy
Apr 5 at 20:10
@ShreevatsaR Thanks for that option!
– Levy
Apr 5 at 20:10
add a comment |
3 Answers
3
active
oldest
votes
documentclass[12pt,a4paper]{article}
directlua{
function prod(a,b)
tex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
end
}
begin{document}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
One tricky thing is getting the backslash escaping game right: LuaTeX: How to handle a Lua function that prints TeX macros. directlua
expands macros before passing them on to Lua, so times
gets messed up. But something like stringtimes
, which should stop that expansion does not quite work as intended because t
is a special escape for the tab in Lua. Hence we need to escape the backslash there. In Lua you would have to type \times
, but in TeX we need to stop the \
from being expanded, so we need string\times
. That is one of the reasons why it is often recommended to use the luacode
package or externalise Lua functions into their own .lua
files and then load them with dofile
or require
(see for example How to do a 'printline' in LuaTeX, a bit on dofile
and require
can be found at LuaLatex: Difference between `dofile` and `require` when loading lua files).
Another thing is that you need ..
to concatenate strings.
Finally, you probably want the entire expression in math mode and not just certain bits.
Also moved the directlua
function definition into the preamble. (Thanks to Mico for the suggestion.)
That's what I was looking for. It worked here. Thank you!
– Levy
Apr 5 at 19:40
And the explanation was really helpful!
– Levy
Apr 5 at 19:40
add a comment |
documentclass[12pt,a4paper]{article}
begin{document}
directlua{
function prod(a,b)
tex.print(a.. "$string\times$".. b.. "$=$".. a*b)
end
}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
add a comment |
Just for completeness, here's a solution that shows how to (a) write the Lua code to an external file, (b) load the Luacode via a directlua{dofile("...")}
directive, and (c) set up a LaTeX "wrapper" macro (called showprod
in the example below) whose function (pun intended) is to invoke the Lua function.
Note that with this setup, one can write \
rather than string\
to denote a single backslash character. (This is also the case for the luacode
and luacode*
environments that are provided by the luacode
package.)
RequirePackage{filecontents}
begin{filecontents*}{show_prod.lua}
function show_prod ( a , b )
tex.sprint ( "$"..a.."\times"..b.."="..a*b.."$" )
end
end{filecontents*}
documentclass{article}
%% Load Lua code from external file and define a LaTeX "wrapper" macro
directlua{dofile("show_prod.lua")}
newcommandshowprod[2]{directlua{show_prod(#1,#2)}}
begin{document}
The product of 2 and 3: showprod{2}{3}.
end{document}
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "85"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2ftex.stackexchange.com%2fquestions%2f483416%2fperform-and-show-arithmetic-with-lualatex%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
documentclass[12pt,a4paper]{article}
directlua{
function prod(a,b)
tex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
end
}
begin{document}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
One tricky thing is getting the backslash escaping game right: LuaTeX: How to handle a Lua function that prints TeX macros. directlua
expands macros before passing them on to Lua, so times
gets messed up. But something like stringtimes
, which should stop that expansion does not quite work as intended because t
is a special escape for the tab in Lua. Hence we need to escape the backslash there. In Lua you would have to type \times
, but in TeX we need to stop the \
from being expanded, so we need string\times
. That is one of the reasons why it is often recommended to use the luacode
package or externalise Lua functions into their own .lua
files and then load them with dofile
or require
(see for example How to do a 'printline' in LuaTeX, a bit on dofile
and require
can be found at LuaLatex: Difference between `dofile` and `require` when loading lua files).
Another thing is that you need ..
to concatenate strings.
Finally, you probably want the entire expression in math mode and not just certain bits.
Also moved the directlua
function definition into the preamble. (Thanks to Mico for the suggestion.)
That's what I was looking for. It worked here. Thank you!
– Levy
Apr 5 at 19:40
And the explanation was really helpful!
– Levy
Apr 5 at 19:40
add a comment |
documentclass[12pt,a4paper]{article}
directlua{
function prod(a,b)
tex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
end
}
begin{document}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
One tricky thing is getting the backslash escaping game right: LuaTeX: How to handle a Lua function that prints TeX macros. directlua
expands macros before passing them on to Lua, so times
gets messed up. But something like stringtimes
, which should stop that expansion does not quite work as intended because t
is a special escape for the tab in Lua. Hence we need to escape the backslash there. In Lua you would have to type \times
, but in TeX we need to stop the \
from being expanded, so we need string\times
. That is one of the reasons why it is often recommended to use the luacode
package or externalise Lua functions into their own .lua
files and then load them with dofile
or require
(see for example How to do a 'printline' in LuaTeX, a bit on dofile
and require
can be found at LuaLatex: Difference between `dofile` and `require` when loading lua files).
Another thing is that you need ..
to concatenate strings.
Finally, you probably want the entire expression in math mode and not just certain bits.
Also moved the directlua
function definition into the preamble. (Thanks to Mico for the suggestion.)
That's what I was looking for. It worked here. Thank you!
– Levy
Apr 5 at 19:40
And the explanation was really helpful!
– Levy
Apr 5 at 19:40
add a comment |
documentclass[12pt,a4paper]{article}
directlua{
function prod(a,b)
tex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
end
}
begin{document}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
One tricky thing is getting the backslash escaping game right: LuaTeX: How to handle a Lua function that prints TeX macros. directlua
expands macros before passing them on to Lua, so times
gets messed up. But something like stringtimes
, which should stop that expansion does not quite work as intended because t
is a special escape for the tab in Lua. Hence we need to escape the backslash there. In Lua you would have to type \times
, but in TeX we need to stop the \
from being expanded, so we need string\times
. That is one of the reasons why it is often recommended to use the luacode
package or externalise Lua functions into their own .lua
files and then load them with dofile
or require
(see for example How to do a 'printline' in LuaTeX, a bit on dofile
and require
can be found at LuaLatex: Difference between `dofile` and `require` when loading lua files).
Another thing is that you need ..
to concatenate strings.
Finally, you probably want the entire expression in math mode and not just certain bits.
Also moved the directlua
function definition into the preamble. (Thanks to Mico for the suggestion.)
documentclass[12pt,a4paper]{article}
directlua{
function prod(a,b)
tex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
end
}
begin{document}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
One tricky thing is getting the backslash escaping game right: LuaTeX: How to handle a Lua function that prints TeX macros. directlua
expands macros before passing them on to Lua, so times
gets messed up. But something like stringtimes
, which should stop that expansion does not quite work as intended because t
is a special escape for the tab in Lua. Hence we need to escape the backslash there. In Lua you would have to type \times
, but in TeX we need to stop the \
from being expanded, so we need string\times
. That is one of the reasons why it is often recommended to use the luacode
package or externalise Lua functions into their own .lua
files and then load them with dofile
or require
(see for example How to do a 'printline' in LuaTeX, a bit on dofile
and require
can be found at LuaLatex: Difference between `dofile` and `require` when loading lua files).
Another thing is that you need ..
to concatenate strings.
Finally, you probably want the entire expression in math mode and not just certain bits.
Also moved the directlua
function definition into the preamble. (Thanks to Mico for the suggestion.)
edited Apr 5 at 20:04
answered Apr 5 at 19:34
moewemoewe
96.5k10118362
96.5k10118362
That's what I was looking for. It worked here. Thank you!
– Levy
Apr 5 at 19:40
And the explanation was really helpful!
– Levy
Apr 5 at 19:40
add a comment |
That's what I was looking for. It worked here. Thank you!
– Levy
Apr 5 at 19:40
And the explanation was really helpful!
– Levy
Apr 5 at 19:40
That's what I was looking for. It worked here. Thank you!
– Levy
Apr 5 at 19:40
That's what I was looking for. It worked here. Thank you!
– Levy
Apr 5 at 19:40
And the explanation was really helpful!
– Levy
Apr 5 at 19:40
And the explanation was really helpful!
– Levy
Apr 5 at 19:40
add a comment |
documentclass[12pt,a4paper]{article}
begin{document}
directlua{
function prod(a,b)
tex.print(a.. "$string\times$".. b.. "$=$".. a*b)
end
}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
add a comment |
documentclass[12pt,a4paper]{article}
begin{document}
directlua{
function prod(a,b)
tex.print(a.. "$string\times$".. b.. "$=$".. a*b)
end
}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
add a comment |
documentclass[12pt,a4paper]{article}
begin{document}
directlua{
function prod(a,b)
tex.print(a.. "$string\times$".. b.. "$=$".. a*b)
end
}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
documentclass[12pt,a4paper]{article}
begin{document}
directlua{
function prod(a,b)
tex.print(a.. "$string\times$".. b.. "$=$".. a*b)
end
}
The product of 2 and 3: directlua{prod(2,3)}.
end{document}
answered Apr 5 at 19:34
Ulrike FischerUlrike Fischer
198k9306692
198k9306692
add a comment |
add a comment |
Just for completeness, here's a solution that shows how to (a) write the Lua code to an external file, (b) load the Luacode via a directlua{dofile("...")}
directive, and (c) set up a LaTeX "wrapper" macro (called showprod
in the example below) whose function (pun intended) is to invoke the Lua function.
Note that with this setup, one can write \
rather than string\
to denote a single backslash character. (This is also the case for the luacode
and luacode*
environments that are provided by the luacode
package.)
RequirePackage{filecontents}
begin{filecontents*}{show_prod.lua}
function show_prod ( a , b )
tex.sprint ( "$"..a.."\times"..b.."="..a*b.."$" )
end
end{filecontents*}
documentclass{article}
%% Load Lua code from external file and define a LaTeX "wrapper" macro
directlua{dofile("show_prod.lua")}
newcommandshowprod[2]{directlua{show_prod(#1,#2)}}
begin{document}
The product of 2 and 3: showprod{2}{3}.
end{document}
add a comment |
Just for completeness, here's a solution that shows how to (a) write the Lua code to an external file, (b) load the Luacode via a directlua{dofile("...")}
directive, and (c) set up a LaTeX "wrapper" macro (called showprod
in the example below) whose function (pun intended) is to invoke the Lua function.
Note that with this setup, one can write \
rather than string\
to denote a single backslash character. (This is also the case for the luacode
and luacode*
environments that are provided by the luacode
package.)
RequirePackage{filecontents}
begin{filecontents*}{show_prod.lua}
function show_prod ( a , b )
tex.sprint ( "$"..a.."\times"..b.."="..a*b.."$" )
end
end{filecontents*}
documentclass{article}
%% Load Lua code from external file and define a LaTeX "wrapper" macro
directlua{dofile("show_prod.lua")}
newcommandshowprod[2]{directlua{show_prod(#1,#2)}}
begin{document}
The product of 2 and 3: showprod{2}{3}.
end{document}
add a comment |
Just for completeness, here's a solution that shows how to (a) write the Lua code to an external file, (b) load the Luacode via a directlua{dofile("...")}
directive, and (c) set up a LaTeX "wrapper" macro (called showprod
in the example below) whose function (pun intended) is to invoke the Lua function.
Note that with this setup, one can write \
rather than string\
to denote a single backslash character. (This is also the case for the luacode
and luacode*
environments that are provided by the luacode
package.)
RequirePackage{filecontents}
begin{filecontents*}{show_prod.lua}
function show_prod ( a , b )
tex.sprint ( "$"..a.."\times"..b.."="..a*b.."$" )
end
end{filecontents*}
documentclass{article}
%% Load Lua code from external file and define a LaTeX "wrapper" macro
directlua{dofile("show_prod.lua")}
newcommandshowprod[2]{directlua{show_prod(#1,#2)}}
begin{document}
The product of 2 and 3: showprod{2}{3}.
end{document}
Just for completeness, here's a solution that shows how to (a) write the Lua code to an external file, (b) load the Luacode via a directlua{dofile("...")}
directive, and (c) set up a LaTeX "wrapper" macro (called showprod
in the example below) whose function (pun intended) is to invoke the Lua function.
Note that with this setup, one can write \
rather than string\
to denote a single backslash character. (This is also the case for the luacode
and luacode*
environments that are provided by the luacode
package.)
RequirePackage{filecontents}
begin{filecontents*}{show_prod.lua}
function show_prod ( a , b )
tex.sprint ( "$"..a.."\times"..b.."="..a*b.."$" )
end
end{filecontents*}
documentclass{article}
%% Load Lua code from external file and define a LaTeX "wrapper" macro
directlua{dofile("show_prod.lua")}
newcommandshowprod[2]{directlua{show_prod(#1,#2)}}
begin{document}
The product of 2 and 3: showprod{2}{3}.
end{document}
answered Apr 5 at 20:14
MicoMico
286k32390779
286k32390779
add a comment |
add a comment |
Thanks for contributing an answer to TeX - LaTeX Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2ftex.stackexchange.com%2fquestions%2f483416%2fperform-and-show-arithmetic-with-lualatex%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
3
Try
tex.print("$" .. a .. "string\times" .. b .. "=" .. a*b .. "$")
– moewe
Apr 5 at 19:32
1
Unlike TeX, to which everything is (by default) a token to be typeset so you can simply write "hello world" and have those words appear in the typeset output, Lua is a general-purpose programming language in which something like
a b
is a syntax error (assuminga
andb
are variables). Here,tex.print
is a Lua function that takes a single string as input, so you need to give it a single string. (There are other forms oftex.print
too, that you can read in the LuaTeX manual, but those are probably not what you want.) Lua uses..
to concatenate strings.– ShreevatsaR
Apr 5 at 19:39
2
BTW instead of concatenating different strings with
..
, you can also usestring.format
to build a string, e.g. in a filetest.lua
putfunction prod(a,b) tex.print(string.format([[$%d times %d = %d$]], a, b, a*b)) end
and in your file dodirectlua{dofile('test.lua')}
-- here the[[
instead of"
is to avoid needing to escape the backslash intimes
.– ShreevatsaR
Apr 5 at 19:46
@ShreevatsaR Thanks for that option!
– Levy
Apr 5 at 20:10