Xerox Printer manual LET command, Relative coordinate

USING HFDL COMMANDS

Sample strings you can use are as follows:

'.' produces . . . . . . . . . . . . . . . . . . . . . . . . .

'*' produces *****************************

'±.' produces ±.±.±.±.±.±.±.±.±.±.±.±.±.±.±.±.±.±.±.±.±.±. 'xo' produces xoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxo

LET command

Use the LET command to define variable names. You can specify all x and y coordinates with either literal values or variable names. If you use variable names, you must first define them with the LET command. The LET command allows an identifier (variable) to equal an n value. Variable names must begin with an alphabetic character and may be up to 16 characters in length.

You can define up to 50 variables for each form (two to ten variables for each form is typical). You can define the maximum number of variables in one LET statement or in individual statements. You can place LET statements anywhere in the form following the FORM statement, and you can redefine variables any number of times.

You can only set variables to a specific numeric amount. You cannot specify units in the LET statement. However, you can specify units (if needed) when the variable is used as a coordinate. For example, if variable Y1 is set to 3 in a LET statement and a line is drawn at Y1 inches, it is drawn at 3 inches. If the grid units are dots and no units are specified, then the line Y1 is drawn at 3 dots.

Figure 3±24 shows the LET command syntax flow.

Figure 3±24. LET command syntax

LET	identifier	=	identifier	;
			n
		,

Parameters identifier = identifier specifies the variable name and value you select for the LET command. The first identifier specifies the variable and the second identifier specifies the variable value n.

Default None.

Examples Long form:

LET X1 = 5.5, X2 = 4.0, Y1 = 3.0;

There is no short form.

Relative coordinate

You can specify all coordinates as literal values or variables. You must first define variables in the LET statement. Refer to the ªLET commandº section for additional information. If you use variables outside of the LET command, they are called relative coordinates. These coordinates can also have a positive or a negative value. This allows you to place text items relative to one another. If you want to shift the whole block of text up or

HOST FORMS DESCRIPTION LANGUAGE 3.2 FOR IBM MVS CREATING FORMS 3±33