Pass blank as argument to a command

Question

How can I pass a blank to this command

\newcommand{\iam}[1][happy]{I am #1.}

so that I get this result

I am .

Note: My actual command operates in the math mode, so the space between "am" and "." is of no concern.

OK. It isn't much of an answer but it is all yours ;). – cfr Oct 25 '14 at 21:13 — cfr, Oct 25 '14 at 21:13

score 2 · Accepted Answer · answered Oct 25 '14 at 21:13

2

To pass an empty optional argument, thus overriding the non-blank default, just use []:

\iam[]

answered Oct 25 '14 at 21:13

cfr

1 Answers1