A decision variable instance. Each member of this class belongs to a single Variable
. Note that accessors available here are replicated at Variable
level for ease of use when dealing with scalar variables.
All AMPL suffixes for an algebraic variable are available through methods with the same name in this class. See http://www.ampl.com/NEW/suffbuiltin.html for a list of the available suffixes.
All the accessors in this class throw a IllegalArgumentException
if the instance has been deleted in the underlying AMPL interpreter.