Chapter 4-2: True/False Status Indicators

Adding Execution Conditions

Now consider the following modification to the example in Using AND After an IF Statement:

    T     IF       TAR CUSTOMER BALANCE           GT     0
    T     AND      TAR WORK ON ACCOUNT AMOUNT     NE     0

Notice that the first execution condition of each statement now has a T in it. Adding the Ts results in the following:

·    The IF statement executes only if the level 1 true/false status indicator is T.

·    If it executes, the IF statement sets the level 2 indicator to T or F, as appropriate.

·    The AND statement executes only if the level 1 indicator is T and the level 2 indicator is T. (If the level 2 indicator is already F, there is no need to execute the AND statement.)

·    The AND statement changes the level 2 indicator to F if the AND statement is false; otherwise, the level 2 indicator is preserved (left unchanged as T).

APPX Application Design Manual (01/13/03)

© 2003 by APPX Software, Inc. All rights reserved