General ⇒ Define Variable

[pelle2005]

Hi to all,
someone say if it is possible to define a variable in latex and after that to use it in a if instruction?
I can't find information about this..
For example i would like to define a variable called "version" and use it to include a .tex file rather than another .tex file.
Thank you for the help

[T3.]

TeX does not have variables per se, and its if construct is also rather unusual. You could use something like this using macros and token comparison:

Code: Select all

\def\verA{1}
\def\verB{2}
\def\ver{1}
\ifx\ver\verA
%do something for version 1
\fi
\ifx\ver\verB
%do something for version 2
\fi

See also this and this thread.

Cheers,

Tomek

[Stefan Kottwitz]

Hi,

the comment package provides a simple way with environments for different versions that can be excluded or included.

Stefan