[Tex/LaTex] Why is the ifthen package obsolete


In the LaTeX companion, the authors recommend to use the package ifthen for complex conditional.

But in his answer to LaTeX conditional expression Will Robertson doesn't mention it, and in the comments, Philipp says that the package is obsolete.

The question is in which way ifthen is obsolete and what are the risk to use it in a document.

Best Answer

The main reason why people may consider ifthen obsolete (last version is of 2001/05/26 with about one page of user manual plus four pages of code documentation) is that it is superseded by e.g. etoolbox, which uses the advanced possibilities of eTeX. Using these allows faster processing. You still can use ifthen for your existing and new documents if you like and I don't think there is a risk in doing so. However for new code, especially new packages which use a lot of boolean expression using the more modern alternatives is recommended.