The parameters block
A model parameter is a symbol, the value of which can be set just before running the model (optional parameter of the 'run' command of the command line interpreter). The general form of the parameters block is:
| parameters ident1 = Expression1 [ ident2 = Expression2 ...] end-parameters |
where each identifier identi is the name of a parameter and the corresponding expression Expressioni its default value. This value is assigned to the parameter if no explicit value is provided at the start of the execution of the program (e.g. as a parameter of the 'run' command). Note that the type (integer, real, text string or Boolean) of a parameter is implied by its default value. Model parameters are manipulated as constants in the rest of the source file (it is not possible to alter their original value).
parameters size=12 ! Integer parameter R=12.67 ! Real parameter F="myfile" ! Text string parameter B=true ! Boolean parameter end-parameters
In addition to model parameters, Mosel and some modules and packages provide control parameters : they can be used to give information on the system (e.g. success of an I/O operation) or control its behaviour (e.g. select output format of real numbers). These parameters can be accessed and modified using the routines getparam and setparam. Refer to the documentation of these functions for a complete listing of available Mosel parameters. The documentation of the modules include the description of the parameters they publish.
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