Changes

<code>\define</code> is like the TeX primitive <code>\def</code>: it defines a new TeX macro. Unlike <code>\def</code>, '''<code>\define</code> can never redefine''' an already defined command.

=== define vs def ===Unlike <code>\def</code>, it will '''not allow you to redefine''' an already defined command. The optional (bracketed) argument denotes the number of parameters you can give

== pitfalls Pitfalls ==<code>\define</code> does not use <code>\{{cmd|long</code>}}, that means in MkIImultiple paragraphs (e.g. through <code>\{{cmd|par</code> }} or <code>\{{cmd|endgraf</code>}})

<context mode=mkiv source="yes">\define[1]\hello{Good morning, #1!}

% \define[1]\mp3{The ID3 Tag of the MP3 file is, : #1!}

\define[1]\mpThree{The ID3 Tag of the MP3 file is, : #1!}

% You may not can use umlauts non-ASCII characters in mkiiMkIV, but not in MkII.% This example is compiled using mkiv .% \define[1]\KüFst{Küstenfunkstelle, #1!}

\hello \KüFst{mom12} 

[[Category:CommandsCommand/Internals|define]]