Evaluating Expressions with Different Precedence Levels

$1\mathrm{.}1.$ Operator Precedence and Associativity

Operator Precedence: Operator precedence determines the order in which different operators in an expression are evaluated. Operators with higher precedence are evaluated before those with lower precedence. In C$,$ operators are grouped by their precedence levels. For example:

$***\frac{,}{?},$ and $\%$ have higher precedence than $+$ and $-.$

and $-$ have the same precedence and are evaluated from left to right, known as left$-$to$-$right associativity.

Operators like $++$ and $--($both prefix and postfix$)$ have higher precedence than arithmetic operators.

Operator Associativity: When operators with the same precedence appear in an expression, their associativity determines the order of evaluation. Most operators have left$-$to$-$right associativity, meaning they are evaluated from left to right. For example:

In the expression $5+3-2,$ addition and subtraction are evaluated from left to right.