Understanding Assignments

Use an assignment to assign a field with a fixed value or a mathematical expression. For example, you can create an assignment that inserts a default value when the user leaves the field. You can also use an assignment to calculate a value

When you create an expression, calculate only the data items that are of the exact same numerical scale or data type. For example, do not calculate different currencies or decimal figures that represent different decimal values because the result of these calculations might compromise data integrity.