Operator Precedence

When several operations occur in an expression, each part is evaluated and resolved in a predetermined order.  That order is known as operator precedence.  Parentheses can be used to override the order of precedence and force some parts of an expression to be evaluated before others.  Operations within parentheses are always performed before those outside.  Within parentheses, however, normal operator precedence is maintained.

When expressions contain operators from more than one category, arithmetic operators are evaluated first, comparison operators are evaluated next, and logical operators are evaluated last.  Within individual categories, operators are evaluated in the order of precedence shown below:

 Arithmetic Comparison Logical

 Exponentiation (^) Equality (=) Not Negation ( - ) Inequality (<>) And Multiplication and division (*, / ) Less than (<) Or Integer division (\) Greater than (>) Xor Modulo arithmetic (Mod) Less than or Equal to (<=) Eqv Addition and subtraction (+, -) Greater than or Equal to (>=) Imp String concatenation (&) Like Is

Note   All comparison operators have equal precedence, that is, they are evaluated in the left-to-right order in which they appear.

When multiplication and division occur together in an expression, each operation is evaluated as it occurs from left to right.  Likewise, when addition and subtraction occur together in an expression, each operation is evaluated in order of appearance from left to right.

The string concatenation operator (&) is not really an arithmetic operator, but in precedence it does fall after all arithmetic operators and before all comparison operators.  Similarly, the Like operator, while equal in precedence to all comparison operators, is actually a pattern-matching operator.

Arithmetic Operators

Comparison Operators

Concatenation Operators

Logical Operators

Other Operators

Arithmetic Operators

^ Operator

* Operator

/ Operator

\ Operator

Mod Operator

+ Operator

- Operator

Concatenation Operators

& Operator

+ Operator

Other Operators

Is Operator

Like Operator

Logical Operators

And Operator

Eqv Operator

Imp Operator

Not Operator

Or Operator

Xor Operator