MOLCAS manual:

6.2 Environment and EMIL Commands

The following are basic and most common commands for the MOLCAS environment variables and input language (EMIL):

Variable	Purpose
MOLCAS	MOLCAS home directory.
MOLCAS_MEM	Memory definition in Mb. Default 1024.
MOLCAS_PRINT	Printing level: 2 Normal, 3 Verbose
MOLCAS_PROJECT	Name used for the project/files.
MOLCAS_WORKDIR	Scratch directory for intermediate files.

Command	Purpose
»Do While	Start of a loop in an input file for geometry optimization with conditional termination.
»Foreach	Start of a loop in an input file over a number of items.
»EndDo	End of a loop in an input file.
»If ( condition )	Start of If block.
»EndIf	End of If block.
»Label Mark	Setting the label "Mark" in the input.
»Goto Mark	Forward jump to the label "Mark" skipping that part of the input.