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6.3 Operators
6.3.1 Arithmetic Operators
Arithmetic operators include a negative sign (-) and operators for multiplication (*), division (/),
addition (+), and subtraction (-). They also include modulo operator
MOD .
■ Modulo Operation (
MOD
)
The MOD operator executes the modulo operation; that is, it divides expression 1
by
expression 2
(see the format below) and returns the remainder.
Syntax: expression1 MOD expression2
Where one or more spaces or tab codes should precede and follow the MOD .
If these expressions include real values, the MOD first rounds them off to integers and
then executes the division operation. For example, the MOD treats expression 8 MOD
3.4 as 8 MOD 3 so as to return the remainder "2".
■
Overflow and Division by Zero
Arithmetic overflow resulting from an operation or division by zero will cause a run-time
error. Such an error may be trapped by error trapping.
Operations Arithmetic Operators Precedence
Examples
Negation
-
1
-a
Multiplication and division
*
and
/
2
a*b, a/b
Modulo arithmetic
MOD
3
a MOD b
Addition and subtraction
+ and –
4
a+b, a-b