Precedence
Precedence rules
Precedence rules for arithmetic, logical, and relational operators
| Operator/Convention | Description | Explanation |
|---|---|---|
| ( ) | Items within parentheses are evaluated first | In (a * (b + c)) - d, the + is evaluated first, then *, then -. |
| * / % + - | Arithmetic operators (using their precedence rules; see earlier section) | z - 45 * y < 53 evaluates * first, then -, then <. |
| < <= > >= == != | Relational, (in)equality, and membership operators | x < 2 or x >= 10 is evaluated as (x < 2) or (x >= 10) because < and >= have precedence over or. |
| not | not (logical NOT) | not x or y is evaluated as (not x) or y |
| and | Logical AND | x == 5 or y == 10 and z != 10 is evaluated as (x == 5) or ((y == 10) and (z != 10)) because and has precedence over or. |
| or | Logical OR | x == 7 or x < 2 is evaluated as (x == 7) or (x < 2) because < and == have precedence over or |