Commodore Plus 4 - Page 176

BASIC Tne ARITHMETIC operators include the following signs:
OPERATORS + addition
- subtraction
* multiplication
/ division
raising to a power (exponentiation)
On a line containing more than one operator, there is a set order in —*
which operations always occur. If several operators are used together,
the computer assigns priorities as follows; First, exponentiation, then
multiplication and division, and last, addition and subtraction. If two
operations have the same priority, then calculations are performed in
order from left to right. If you want these operations to occur in a dif
ferent order, Plus/4 BASIC allows you to give a calculation a higher
priority by placing parentheses around it. Operations enclosed in
parentheses will be calculated before any other operation You have
to make sure that your equations have the same number of left par
entheses as right parentheses, or you will get a SYNTAX ERROR
message when your program is run.
There are also operators for equalities and inequalities, called
RELATIONAL operators Arithmetic operators always take priority
over relational operators. —
= is equal to
< is less than
> is greater than
< = or =< is less than or equal to
>= or => is greater than or equal to
<> or >< is not equal to
Finally, there are three LOGICAL operators, with lower priority than
both arithmetic and relational operators: —
AND
OR
NOT
These are used most often to join multiple formulas in IF... THEN
statements. When they are used with arithmetic operators, they are
evaluated last (i.e.. after + and -).
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