latex: printing a variable in roman numerals

Question

I'm typesetting in LaTeX, and I'd like to display a "variable" (in my case, a reference \ref{blah} to an item number in list) in roman rather than the default arabic. Is there an easy way to do this? Thanks for any pointers!

Answer 1

lowercase

\romannumeral 0\ref{blah}\relax

uppercase

\uppercase\expandafter{\romannumeral 0\ref{blah}}

Answer 2

What are the references to? Usually, you would redefine how that particular counter is displayed.

For example, to change how a section number is displayed, you could use the following command:

\renewcommand\thesection{\Roman{section}}

Now, each command that internally uses \thesection will print the section number as a roman numeral.

Similar commands work for chapter, figure etc.

\roman (lowercase r) yield lowercase roman numerals.

Answer 3

You can try \def\theenumi{\roman{enumi}} inside an enumerate environment -- this changes both labels and refs, but you'll have to then explicitly undo it (if you want to).

Answer 4

For lowercase: {\romannumeral \ref{blah}}

For uppercase: \uppercase\expandafter{\romannumeral \ref{blah}}