Commodore VIC-20 - Page 47

READ
Format: Abbreviation: Screen Display:
READ variable list R HfflHI E R —;
This works with the DATA statement to fill variables with values
stored within the program. The information Is usually in the form of a
list that is READ in at the beginning of the program, or a table that is
re-READ during the program. READ works just like INPUT, except
that the information comes from DATA statements instead of the
person working the program.
EXAMPLE:
10 READ A, B; CS
20 DATA 1, 2, HELLO THERE!
REM
Format: Abbreviation: Screen Display:
REM any text None None
This statement makes your program more easily understood
when LISTed. It is a reminder to yourself to telJ you what you had in
mind when writing each section. For instance, you might tell what a
variable is used for, what date the program was written, or some
other useful piece of informatfon. The REMark can be "any-text,
word, or character, including the colon (:) or BASIC keywords!
Therefore, the REM statement is the fast one on a Jine that the
program sees.
ff you try to use graphic characters in a REM statement without
using a quote mark Q first, when you LfST the line youJI see BASIC
keywords instead of the graphic characters. This is because the
VIC thinks these characters are the "tokens" for those commands.
The BASIC tokens are discussed in the last part of this chapter.
EXAMPLE;
REM PROGRAM BY SUE M. 10/6/81 Good example
REM AS HOLDS 22 CURSOR DOWNS Good example
LET A- 1 : REM PUT A1INA Bad example
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