### Operator Precedence

In C programming, operator precedence determines the order in which operations are performed in an expression. Operators with higher precedence are evaluated before operators with lower precedence.

For example, in the expression "3 + 4 * 5", the multiplication operator (*) has higher precedence than the addition operator (+), so the multiplication is performed first (4 * 5 = 20) and then the addition is performed (3 + 20 = 23).

In cases where operators have the same precedence, the order in which they are evaluated is determined by their associativity. There are two types of associativity: left-to-right and right-to-left.

Operators with left-to-right associativity are evaluated from left to right, while operators with right-to-left associativity are evaluated from right to left. For example, in the expression "3 + 4 - 5", the addition operator (+) and the subtraction operator (-) have the same precedence, but left-to-right associativity, so the addition is performed first (3 + 4 = 7) and then the subtraction is performed (7 - 5 = 2).

The table below shows some common C operators, their precedence and associativity:

Operators Precedence Associativity
() [] -> . 1 (highest)
! ~ ++ -- + - * & (type) 2 right-to-left
* / % 3 left-to-right
+ - 4 left-to-right
<< >> 5 left-to-right
< <= > >= 6 left-to-right
== != 7 left-to-right
& 8 left-to-right
^ 9 left-to-right
| 10 left-to-right
&& 11 left-to-right
|| 12 left-to-right
?: 13 right-to-left
= += -= *= /= %= &= ^= |= 14 right-to-left
, 15 left-to-right

It's worth noting that there are a few other operators in C that are not listed here, such as the conditional operator (?:) and the size of operator, and also the precedence and associativity of operators may vary depending on the context.