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added precedence table for C

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scbj
2026-06-15 14:44:54 +02:00
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c-operator-precedence.md
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# C operator precedence
+---------------+---------------+---------------------------------------+-------------------+
| **piority** | **operator** | **description** | **associativity** |
+==============:+:==============+:======================================+:==================+
| 1 | `++`, `--` | *postfix*/suffix increment and | left to right |
| | | decrement | |
| +---------------+---------------------------------------+ |
| | `()` | function call | |
| +---------------+---------------------------------------+ |
| | `[]` | array indexing/subscripting | |
| +---------------+---------------------------------------+ |
| | `.` | member access (struct or union) | |
| +---------------+---------------------------------------+ |
| | `->` | dereferencing member access | |
| | | (struct or union) | |
| +---------------+---------------------------------------+ |
| | `(type){list}`| dereferencing member access | |
| | | (struct or union) | |
+---------------+---------------+---------------------------------------+-------------------+
| 2 | `++`, `--` | *prefix* increment and decrement | right to left |
| +---------------+---------------------------------------+ |
| | `+`, `-` | unary plus and minus (sign) | |
| +---------------+---------------------------------------+ |
| | `!`, `~` | logical and bitwise `NOT` | |
| +---------------+---------------------------------------+ |
| | `(type)` | type cast | |
| +---------------+---------------------------------------+ |
| | `*` | dereferencing (indirection) | |
| +---------------+---------------------------------------+ |
| | `&` | referencing (get address of) | |
| +---------------+---------------------------------------+ |
| | `sizeof` | size of (builtin) | |
| +---------------+---------------------------------------+ |
| | `_Alignof`, | alignment requirement (C11 & C23 | |
| | `alignof` | respectively) | |
+---------------+---------------+---------------------------------------+-------------------+
| 3 | `*`, `/`, `%` | multiplication, division and modulo | left to right |
+---------------+---------------+---------------------------------------+-------------------+
| 4 | `+`, `-` | addition and subtractionion | left to right |
+---------------+---------------+---------------------------------------+-------------------+
| 5 | `<<`, `>>` | bitwise left and right shift | left to right |
+---------------+---------------+---------------------------------------+-------------------+
| 6 | `<`, `<=`, | less than, less or equal, | left to right |
| | `>`, `>=` | greater than and greater or euqal | |
+---------------+---------------+---------------------------------------+-------------------+
| 7 | `==`, `!=` | equals and unequals | left to right |
+---------------+---------------+---------------------------------------+-------------------+
| 8 | `&` | bitwise `AND` | left to right |
+---------------+---------------+---------------------------------------+-------------------+
| 9 | `^` | bitwise `XOR` (exclusive or) | left to right |
+---------------+---------------+---------------------------------------+-------------------+
| 10 | `|` | bitwise `OR` (inclusive or) | left to right |
+---------------+---------------+---------------------------------------+-------------------+
| 11 | `&&` | logical `AND` | left to right |
+---------------+---------------+---------------------------------------+-------------------+
| 12 | `||` | bitwise `OR` | left to right |
+---------------+---------------+---------------------------------------+-------------------+
| 13 | `?:` | ternary conditional (inline if) | right to left |
+---------------+---------------+---------------------------------------+-------------------+
| 14 | `=` | simple assignment | right to left |
| +---------------+---------------------------------------+ |
| | `+=`, `-=` | assignment by sum and difference | |
| +---------------+---------------------------------------+ |
| | `*=`, `/=`, | simple assignment product, quotient | |
| | `%=` | and remainder | |
| +---------------+---------------------------------------+ |
| | `<<=`, `>>=` | assignment by bitwise left or right | |
| | | shift | |
| +---------------+---------------------------------------+ |
| | `&=`, `^=`, | assignment by bitwise `AND`, `XOR` | |
| | `|=` | and `OR` | |
+---------------+---------------+---------------------------------------+-------------------+
| 15 | `,` | comma to separate entries in a list | left to right |
+---------------+---------------+---------------------------------------+-------------------+