Commodore VIC-20 - Page 96

3 bytes of memory (one for each number} while the number 1 uses
only 1 byte. ,
PUTTING MULTIPLE INSTRUCTIONS ON
EACH LINE
You can put more than one instruction on each numbered line in
your program by separating them by a colon. The only limitation is
that all the instructions on each line, including colons, should not
exceed the standard 88-character line length. Here is an example
of two programs, before and after crunching:
BEFORE CRUNCHING: AFTER CRUNCHING:
10 PRINT "HELLO. .."; 10 PRINT "HELLO. . .";:FOR
T = 1 TO 500:NEXT:PRINT
20 FORT = 1TO500:NEXT "HELLO,AGAIN. . .":GOTO10
30 PRINT "HELLO, AGAIN. . ."
40 GOTO10 I
REMOVING REM STATEMENTS
REM statements are helpful in reminding yoursei*—or showing
other programmers—what a particular section of a program is
doing. However, when the program is completed and ready to use,
you probably won't need those REM statements anymore and you
can save quite a bit of space by removing the REM statements. If
you plan to revise or study the program structure in the future, it's a
good idea to keep a copy on file with the REM statements intact.
USING VARIABLES
If a number, word or sentence is used repeatedly in your program
it's usually best to define those long words or numbers with a one or
two letter variable. Numbers can be defined as single letters. Words
and sentences can be defined as string variables using a letter and
dollar sign. Here's one example:
BEFORE CRUNCHING AFTER CRUNCHING
10 POKE 36878, 15 10 POKE 36878, 15: S = 36874
20 POKE 36874, 200 30 POKES, 200:POKES, 250:POKES,
30 POKE 36874. 250 150
40 POKE 36874, 150
B0
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