Monarch 9460 Scope of Field Names , Script Flow Control

Program Structure 4-3

The printer buffer is used to store data to print.

Rule: The field lengths in the printer buffer must equal the length of the largest

corresponding field in the formats. For example, if...

the length of Field 1 of Format 1 is 7

the length of Field 1 of Format 2 is 22

the length of Field 1 of Format 3 is 12

Then, the first field's length in the printer buffer must be 22.

You can use an array to store data similar to temporary storage. An array is a series of elements

with the same data type. Arrays can be either numeric or alphanumeric. You can access an element

of an array by providing the array name and an index value. This index value can be a numeric

literal, a numeric buffer-field, or the input buffer. For example, Prices [4] points to the Prices array's

fourth element.

In addition to the information for the DEFINE command listed above, you must also list the number of

elements in the array (the maximum index value). See Chapter 5, "Command Reference," for more

information.

Scope of Field Names

Keep in mind the following information.

♦ You can access all variables globally.

♦ Field names and labels can be up to 255 characters long. However, the first 12 characters must

be unique.

Script Flow Control

You can branch the flow of command control in different ways. The order in which the commands

appear in the script controls the program's flow. At times, control is passed to another command

through the use of valid labels, invalid labels, and the JUMP command. See Chapter 5, "Command

Reference," for information about JUMP.

When a command fails, control passes to an invalid label, if you defined one. For example, the

invalid label may show a message on the printer display. If the script does not identify an invalid

label, control passes to the next line following the executing command. Similarly, when execution is

successful, control passes to a valid label, if you defined one. And, if you did not define a valid

label, control passes to the next line.

Rule: Precede all valid and invalid labels by an asterisk, (*). For example,

ADD CONTROL , TEMP1 , *ERROR2, *SUCCESS2