A.2.2 Operators

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.

Table A.4: Operator precedence.

Operator	Rule
list subscripting	name [ expr ]
function call	name ( expr_sequence )
not	! expr
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.