The Statements Included in the ILF

Each ILF statement is identified by a unique keyword (such as IF, READ, and SET) that indicates to the system what actions to perform. The ILF statements can be grouped into seven functional categories as follows:

Field-related statements

Modify and compute values for fields within an application.

Date/time statements

Calculate and compare dates and elapsed time periods.

Control statements

Allow you to exercise control over the processing flow in an ILF routine, and to invoke non-APPX programs.

Condition-testing statements

Include IF, AND, and OR statements that perform logic tests.

Image-related statements

Allow you to override the “visual” aspects of a screen or report, such as whether an item should be highlighted or allow user input.

File-related statements

Control file management operations, such as creation, deletion, and updates.

Text-related statements

Allow you to provide free-form text messages to users or to insert comments within a routine.

Table 4-1-1 below contains a list of the keywords in their respective categories. Each of these statements is described in detail in Chapter 4-6: ILF Keyword Reference.