For Restricted Plurals

The plural statements command the computer to perform the operation for ALL rows. The some rows may be a problem in that it is not initialized correctly. If the computer is commanded to perform calculations anyway, unpredictable results may occur.

The solution is a "conditional execution" statement which restricts the plural computation to only specified rows. The format of the statement is :

     For a, b, ... and c:
          statement1;
          statement2;
              :
          statementn.
This statement tells the computer to execute the following
statements only for the named rows.  For example:
     For Sam and Mary:
          rate$ = effort$ / time$.
     combined rate = sam's rate + mary's rate;
     combined time = combined effort / combined rate;