Commodore VIC-20 - Page 97

USING READ AND DATA STATEMENTS
Large amounts of data can be typed in as one piece of data at a
time, over and over again ... or you can print the instructional part
of the program ONCE and print all the data to be handled in a long
running list called the DATA statement. This is especially good for
crowding large lists of numbers into a program.
USING ARRAYS AND MATRICES
Arrays and matrices are similar to DATA statements in that long
amounts of data can be handled as a list, with the data handling
portion of the program drawing from that list, in sequence. Arrays
differ in that the list can be two or three dimensional.
ELIMINATING SPACES
One of the easiest ways to reduce the size of your program is to
eliminate all the spaces. Although we often include spaces in
sample programs to provide clarity, you actually don't need any
spaces in your program and will save space if you eliminate them.
USING GOSUB ROUTINES
If you use a particular line or instruction over and over, it might be
wise to GOSUB to the line from several places in your program,
rather than write the whole line or instruction every time you use it.
USING TAB AND SPC
Instead of PRINTing several cursor commands to position a
character on the screen, it is often more economical to use the TAB
and SPC instructions to position words or characters on the screen.
81