General ⇒ How to compare empty string using \equal

[fractal.generator]

Dear all,

I want to detect whether a parameter is an empty string.

Here is the illustration.

Code: Select all

\documentclass{article}
\usepackage{ifthen}

\newcommand\print[1][]
{%
\ifthenelse{\equal{#1}{}}% It does NOT work
{EMPTY}
{#1}
}

\begin{document}
\print

\print[fulltime]
\end{document}

Thank you in advance.


hayashi

[phi]

Hi,
i just tried it and it works. Output is:

Code: Select all

EMPTY
fulltime