BEGIN

PURPOSE:
The BEGIN statement provides the highest level system reset. It performs the following duties:

Resets ERRerr, ERLerl to 0
Resets CTLctl to 0
RESETS FOR/NEXT and GOSUB/RETURN stacks
Resets PRECISIONprecision to 2
Clears all numerics (not in the EXCEPT list) to 0 and all strings (not in the EXCEPT list) to "".
Closes all files and devices that are open 

STATEMENT SYNTAX:
{stno} BEGIN {EXCEPT var list}
where:  var list - is a list of variables which will not be cleared.

EXAMPLE:

0100 POPZ;BEGIN
1234 BEGIN EXCEPT SAVE_STUFF$
NOTES:
The BEGIN statement is normally executed at the beginning of a program to insure the all files are closed and the data area is cleared.