The precedence of all operators is shown in Table A.4. All operators within the same box have the same precedence. Operators in higher boxes have higher precedence than operators in lower ones. For instance the expression a + b * c means a + (b * c) rather than (a + b) * c.
|list subscripting||name [ expr ]|
|function call||name ( expr_sequence )|
|unary minus||- expr|
|unary plus||+ expr|
|multiply||expr * expr|
|divide||expr / expr|
|modulo (remainder)||expr % expr|
|add||expr + expr|
|subtract||expr - expr|
|less than||expr < expr|
|less than or equal||expr <= expr|
|greater than||expr > expr|
|greater than or equal||expr >= expr|
|equal||expr == expr|
|not equal||expr != expr|
|logical AND||expr && expr|
|logical inclusive OR||expr || expr|
Each rule describes an expression. An expression again may contain other expressions described by these rules.
Unary operators are right-associative, binary operators are left-associative. For instance the expression a - b + c means (a - b) + c but not a - (b + c).
Not all operators are defined for all data types. Furthermore, the result of an operator depends on the data type of the operands given. In the following all operators are discussed and classified by the data type of their operands.