demo_begin
==========

begin a demonstration



Séquence d'appel
~~~~~~~~~~~~~~~~


::

    demo_begin()




Description
~~~~~~~~~~~

The function demo_begin is used to begin a demonstration. It sets the
script and the values in mode of non display on the console, save the
environment variables in a temporary file and save the width of the
console. This function shall be used with the function demo_end.



Voir Aussi
~~~~~~~~~~


+ `demo_end`_
+ `demo_run`_
+ `demo_message`_


.. _demo_end: demo_end.html
.. _demo_message: demo_message.html
.. _demo_run: demo_run.html