Basic GAMS syntax

Example program:

         SETS
     I Canning plants /Seattle, SAN-DIEGO/
     J Markets        /NEW-YORK, CHICAGO, TOPEKA /;
PARAMETERS
     A (I)Capacity of plant I in cases
       /  SEATTLE   350
            SAN-DIEGO 600/
     B (J)Demand at market j in cases
       /  NEW-YORK  325
            CHICAGO   300
            TOPEKA    275/;
Table d (I, J)Distance in thousands of miles
                  NEW-YORK     Chicago    Topeka
    Seattle        2.5         1.7        1.8
    SAN-DIEGO      2.5         1.8        1.4;
SCALAR FFreight in dollars per case per thousand miles/90 /;
Parameter c (I, J)Transport cost in thousands of dollars per case;
          C (I, J) = F * D (I, J)/1000;
VARIABLES