Rockwell Automation 1771-DB BASIC MODULE - Manual (Page 183)

Chapter
Statements 11
11 -31
Use the READ statement to retrieve the expressions that you specified in
the DATA statement (page 11 -6) and assign the value of the expression to
the variable in the READ statement. The READ statement is always
followed by one or more variables. If more than one variable follows a
READ statement, separate them by a comma.
Every time a READ statement is encountered the next consecutive
expression in the DATA statement is evaluated and assigned to the variable
in the READ statement. You can place DATA statements anywhere within
a program. They are not executed and do not cause an error.
DATA statements are chained together and appear as one large DATA
statement. If at anytime all the data is read and you execute another READ
statement, the program terminates and the message
ERROR: NO DATA –
IN LINE XX prints to the console device.
See also the DATA (page 11 -6) and RESTORE (page 11 -32) statements.
Syntax
READ
Example
>1 REM EXAMPLE PROGRAM
>10 FOR I = 1 TO 3
>20 READ A,C
>30 PRINT A,C
>40 NEXT I
>50 RESTORE
>60 READ A,C
>70 PRINT A,C
>80 DATA 10,20,10/2,20/2,SIN(PI),COS(PI)
READY
>RUN
10 20
5 10
0 –1
10 20
READY
>
READ