When creating formulas, you have the option of using either Crystal or Basic syntax. Almost any formula written with one syntax can be written with the other. Reports can contain formulas that use Basic syntax as well as formulas that use Crystal syntax.
To insert a formula into a report
Tip The Report Fields, Functions, and Operators trees at the top of the Formula Editor contain the primary formula components. Double-click any component to add it to your formula. See Formula Editor.
Your formula now appears in the Field Explorer, under Formula Fields.
Note A formula that is placed on a report is indicated by the @ prefix (for instance, @ProcessTime).
Creating Formulas with Basic Syntax | Creating Formulas with Crystal Syntax