3 Error Conditions

3.2 Points to Remember

You should keep the following points in mind when using the Loop Facility:

Check termination conditions.
Check the spelling of loop keywords.
Use the loop keywordsand andelse only inif,when, andunless constructs.
Do not follow the loop keyworddo with an atom.
Check that allif andwhen constructs have a complementarythen clause.
Usefor,as, andrepeat constructs only in the loop prologue.
Do not usefor,as, orrepeat iteration inside conditional constructs.
Use unique names for variables within a loop.
Define all loop method extensions before using them.
Avoid type conflicts by checking the syntax of ''loop constructs.''
Make certain that accumulation variables have a data type that is appropriate for the values being accumulated.
Do not use the same variable more than once in a lambda list.
Do not use function or method names that are obsolete.

The Loop Facility - 9 SEP 1996