Atari XL

Logical Thinking
71
10 A = 5 (or any other number)
the program will print O.
This applies to all the other comparisons listed in
Chapter 5 as conditions for IJ.":
Equal
<
Less
than
>
Greater than
<>
Not equal
>=
Greater than or equal
<=
Less than or equal
Try this:
10 A = 5
20 PRINT A <= 7
If you tryout the other tests, you will find they all
behave in the same way.
LOGIC
If two tests are combined, the same true and false
answers are still obtained:
10 A = 5
20 PRINT (A< 7) AND (A> 3)
Now, if the computer evaluates simple relational
expressions such as A<7, A>3 as 1 or 0, what
happens when two are combined, and what does the
AND do?
There are three BASIC commands which can be
used with relational expressions: AND, OR and