GWBASIC User's Manual

GW-BASIC User's Guide
READ Statement
Purpose:
To read values from a DATA statement and assign them to variables.
Syntax:
READ list of variables
Comments:
A READ statement must always be used with a DATA statement.
READ statements assign variables to DATA statement values on a one-to-one basis.
READ statement variables may be numeric or string, and the values read must agree with the
variable types specified. If they do not agree, a "Syntax error" results.
A single READ statement may access one or more DATA statements. They are accessed in order.
Several READ statements may access the same DATA statement.
If the number of variables in list of variables exceeds the number of elements in the DATA
statement(s), an "Out of data" message is printed.
If the number of variables specified is fewer than the number of elements in the DATA statement
(s), subsequent READ statements begin reading data at the first unread element. If there are no
subsequent READ statements, the extra data is ignored.
To reread DATA statements from the start, use the RESTORE statement.
Examples:
.
.
.
80 FOR I=1 TO 10
90 READ A(I)
100 NEXT I
110 DATA 3.08, 5.19, 3.12, 3.98, 4.24
120 DATA 5.08, 5.55, 4.00, 3.16, 3.37
.
.
.
This program segment reads the values from the DATA statements into array A. After execution,
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