Environment variables

Windows NT contains a set of named system and user defined environment variables.  A technical discussion of such items appears at http://support.microsoft.com/default.aspx?scid=kb;en-us;100843#XSLTH3141121122120121120120. GAMS allows one to specify conditionals in response to environment variable values, set user environment variables to particular values and destroy user environment variables.

Names of some system environment variables

Defining and destroying user environment variables

Augmenting environment variables

Accessing environment variable status at any point in the code: $Show