<refentry id="ex">
<refnamediv>
<refname>EX</refname>
<refpurpose>Execute program as overlay</refpurpose>
</refnamediv>

<refsynopsisdiv>
<cmdsynopsis>
<command>EX</command>
<arg choice="plain">
  &replstart;module name&replend;
</arg>
<arg choice="opt">
  &replstart;modifiers&replend;
</arg>
<arg choice="opt">
  &replstart;parameters&replend;
</arg>
</cmdsynopsis>
</refsynopsisdiv>

<refsect1><title>Description</title>
<para>
This a shell built-in command that causes the process executing the
shell to start execution of another program. It permits a transition
from the shell to another program without creating another process,
thus conserving system memory.
</para>
<para>
This command is often used when the shell is called from another
program to execute a specific program, after which the shell is not
needed. For instance, applications which only use BASIC09 need not
waste memory space on SHELL.
</para>
<para>
The &quot;ex&quot; command should always be the last command on a shell input
line because any command line following will never be processed.
</para>
<para>
NOTE: Since this is a built-in SHELL command, it does not appear in
the CMDS directory.
</para>
<para>
For more information see: 4.5, 4.6, 4.9

</para>
</refsect1>
<refsect1><title>Examples</title>
<screen>
ex BASIC09

tsmon /t1&amp;; tsmon /t2&amp;; ex tsmon /term
</screen>
</refsect1>
</refentry>