Crystal Reports for Eclipse Designer Guide

Control structures (Crystal syntax)

Formulas without control structures execute each expression in the formula exactly once when the formula is evaluated. The expressions are executed in a sequential fashion, from the first expression in the formula to the last. Control structures enable you to vary this rigid sequence. Depending upon which control structure you choose, you can skip over some of the expressions or repeatedly evaluate some expressions depending on if certain conditions hold. Control structures are the primary means of expressing business logic and typical report formulas make extensive use of them.



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