                FOR - Perform commands on a set of items
    
    SYNTAX:

        for %<c> in (<item>[ <item>]*) do <command> [!<command>]*
                    
    PARAMETERS:

        c               A non-numeric character.
                
        item            A string or filename specification.
        
        command         A command to be executed.

    DESCRIPTION:

        This command sequentially sets the %c variable to each item and uses
        the variable to evaluate the commands. If an item is an expression
        involving a wildcard ('*' or '?'), then the variable is set to each
        file in the current directory which meets the wildcard file name
        specification.
        
    EXAMPLES:
        
        1. The following command lists the names of the files in the current
           directory with names of the form *.c and *.lst:
        
            for %f in (*.c *.lst) do echo %f
      
        2. The following command implements a more sophisticated file search
           (list files with names of the form xxxy where y is a numeric
           digit):
        
            for %f in (1 2 3 4 5 6 7 8 9 0) do if exist xxx%f echo xxx%f
