Chapter 3 - The simple Modula-2 data types. The material in this
chapter is extremely important to you as you strive to become a
good Modula-2 programmer, but you may also find it to be
somewhat tedious because it contains so many facts. This
material is needed in order to develop the topics in the next
few chapters, but all of the details are not necessarily
required. For that reason, you may wish to go through it rather
rapidly picking up the high points and come back to this chapter
for the details later when they will be much more meaningful. Do
not completely pass over this material at this time or the next
few chapters will be meaningless unless you are already highly
experienced in other programming languages. A program with
variables Load and display the program named INTVAR.MOD for our
first program with some variables in it. This program begins in
the usual way since it has a MODULE header and the IMPORT list.
Next we come to a new reserved word, VAR. This word is used to
indicate to the compiler th