Programming Aids; Entering Programs; Auto; Renumber - Commodore 128D User Manual

Programming
Aids
/ i
GETKEY is very similar to GET, except GETKEY will automatically
wait for a key to be pressed.
In earlier sections, you learned how to make changes in your pro
grams, and correct typing mistakes with INST/DEL. BASIC also pro
vides other commands and functions which help you locate actual
progam errors, and commands which you can use to make program
ming sessions flow more smoothly.
Entering Programs
AUTO
RENUMBER
C128 BASIC provides an auto-numbering pro
cess. You determine the increment for the line
numbers. Let's say you want to number your
program in the usual manner, by tens. Before
you begin to program, while in DIRECT mode,
type:
The computer will automatically number your
program by tens. When you press the RETURN
key, the next line number appears, and the cur
sor is in the correct place for you to type the
next statement. You can choose to have the
computer number the commands with any
increment; you might choose 5 or even 50. Just
place the number after the word AUTO and
press RETURN. To turn off the auto-numbering
feature, type AUTO with no increment, and
press RETURN.
If you write a program and later add statements
to it, sometimes the line numbering can be awk
ward. Using the RENUMBER command you can
change the line numbers to an even increment
for part or all of your program. The RENUMBER
command has several optional parameters, as
listed below in brackets:
RENUMBER [new starting line[,
increment[,old starting line]]]
USING C128 MODE—Some BASIC Commands and Keyboard Operations Unique to
81 C128Mode