Bridge User Manual

Case and Sequence Structures

and the Formula Node

This chapter introduces the basic concepts of Case and Sequence structures

and the Formula Node, and provides activities that explain the following:

• How to use the Case structure

• How to use the Sequence structure

• What sequence locals are and how to use them

• What a Formula Node is and how to use it

Both Case and Sequence structures can have multiple subdiagrams,

configured like a deck of cards, of which only one is visible at a time.

At the top of each structure border is the subdiagram display window,

which contains a diagram identifier in the center and decrement and

increment buttons at each side. The diagram identifier indicates which

subdiagram currently is displayed. For Case structures, a diagram identifier

is a list of values which select the subdiagram. For Sequence structures, a

diagram identifier is the number of the frame in the sequence (0 to n –1).

The following illustration shows a Case structure and a Sequence structure.

Clicking on the decrement (left) or increment (right) button displays the

previous or next subdiagram, respectively. Incrementing from the last

subdiagram displays the first subdiagram, and decrementing from the first

subdiagram displays the last. For more information about Case and

Sequence structures, refer to Chapter 19, Structures, in the G Programming

Reference Manual.

Case Structure Sequence Structure

Increment/Decrement

Buttons

Diagram

Identifier