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Evaluating and Displaying an Expression (Command Program)

Evaluating and Displaying an Expression (Command Program)

In the Command Program, you can interactively evaluate expressions, from simple statements involving a single variable to complex mathematical expressions involving many different events, variables, and functions.

Assume your compiled model is a program containing the following definitions.

value LastYrsSales = 36075;
value DMarkToDollars = 1.55;

A command to display the value of a variable can be as simple as the name of that variable. For example, to display the value of the variable LastYrsSales, you can type the name of the variable as a command.

LastYrsSales

When you click Execute | Run, the number represented by LastYrsSales is displayed in the Log window.

LastYrsSales = 36075;

If you did not compile the program before executing the command, DPL will display the error message Value not found.

The name of a variable is a simple DPL expression, consisting of a value name and no operators. Expressions can also be complex. Suppose the Sales Director wants to know last year's sales in dollars instead of German Marks.

LastYrsSales/DMarkToDollars;

The Session Log displays the result.

LastYrsSales / DMarkToDollars = 23274

In the preceding examples, LastYrsSales and DMarkToDollars did not depend on any conditioning events. However, if a value depends on conditioning events, the states of those events must be known for DPL to know which number is represented by that value.

Versions: DPL Professional, DPL Enterprise, DPL Portfolio

See Also

Working in the Command Program