6.1.6.8 Complex Conditions
A complex condition is formed by combining simple conditions, combined conditions, and/or complex conditions with logical operators, or negating these conditions with logical negation.
Each logical operator must be preceded and followed by a space. The following table shows the logical operators and their meanings.
| Table 27. Logical Operators and Their Meanings | ||
| Logical Operator |
Name |
Meaning |
|---|---|---|
| AND |
Logical conjunction |
The truth value is true when both conditions are true. |
| OR |
Logical inclusive OR |
The truth value is true when either or both conditions are true. |
| NOT |
Logical negation |
Reversal of truth value (the truth value is true if the condition is false). |
Unless modified by parentheses, the following precedence rules (from highest to lowest) apply:
- Arithmetic operations
- Simple conditions
- NOT
- AND
- OR
- The individual truth values of simple conditions
- The intermediate truth values of conditions logically combined or
logically negated.
- A negated simple condition
- A combined condition (which can be negated)
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