# [NTG-context] Defining commands in \start ... \stop

Xan dxpublica at telefonica.net
Sun Mar 30 19:13:57 CEST 2014

Hi,

Concerned with the answers to the [that topic](http://www.ntg.nl/pipermail/ntg-context/2014/077099.html), I was thinking if I could define a command "Exercise" with a optional argument (the "Answer").

\defineblock[question]

\defineenumeration[question][text={Question}]

\keepblocks[question]

Something like
\startexercise My execise ...
\stopexercise

If no more is provide, at the question does \incrementcounter[answer]
If

\startexercise{\startsolution The solution is \stopsolution} My exercise
\stopexercise