Commodore CBM - BASIC Statement Groups

Programs and Immediate Mode
Let us look at how immediate mode can be used to examine values
assigned to labeled variables within a program.
If statement 120 below were in a program and vou wished to find out the
value of the component variables in that statement. vou could use calculator
mode to
print them.
10
Program stored
in memory
120 A=:E:'t.C.···'I1
999 Hm
PEAD'T',
:":E: .. C .. D
15
This illustration assumes that when the program ends. B is assigned the
value 15. C
is assigned the value 1. and D is assigned the value 8.
The current values of variables remain available until vou begin a new pro-
gram. or rerun the same program.
BASIC STATEMENT GROUPS
We are now going to describe the various BASIC statements that Vou may
use in a PET program. PET BASIC statements are described twice:
1. In the balance of this chapter we will describe PET BASIC statements
briefly
bV functional groups. This description is intended to familiarize
vou
with the types of capabilities available in PET BASIC without
becoming buried in detail. This description is also sufficient to provide
background for the discussion of programming concepts
that follows.
2. In Chapter 4 we describe PET BASIC statements individually. with full
detail.
While reviewing these statements. remember that PE.T BASIC has a number
of" characteristics" that give it a unique personality. These characteristics are de-
scribed in Chapter 5.
78