Including a function in a rule expression

Use either or both of the following methods:

Select the function using the dynamic prompts that appear in the Expression workspace as you type.
For more information, see Using dynamic prompts in the Expression workplace.
Drag the function from the Functions tab to the Expression workspace.
If parameters are associated with the function, the Invoke Function dialog box appears.

Note: The expression contains the name of the function, followed by parameters, which are enclosed by parentheses. Optionally, you can type the name of the function and its parameters.