Script variable reference

Provides a reference for the syntax of script variables in OPL.

Table 1. Reference syntax of script variables
Syntax	Effect
variable	Returns the value of `variable`. See Identifiers for the syntax of script variables. If `variable` does not exist, an error is signalled. This is not the same as referencing an existing script variable whose value is the undefined value, which is legal and returns the undefined value. When used in the body of a `with` statement, a variable reference is first looked up as a property of the current default value.