In C, associativity refers to the order in which operators of the same precedence are evaluated in an expression. When two operators of the same precedence appear in an expression, associativity can be either from left to right or from right to left. Associativity is only used when there are two or more operators of the same precedence. It is important to note that associativity doesnt define the order in which operands of a single operator are evaluated.

For example, consider the expression a + b + c. Since + has left-to-right associativity, the expression is evaluated as (a + b) + c . On the other hand, the expression a = b = c is evaluated from right to left, meaning that c is assigned to b, and then the resulting value of b is assigned to a .

The order of evaluation of operands with different levels of precedence is determined by operator precedence. Precedence determines which operator is executed first if there is more than one operator in an expression. The precedence of operators in C is determined by the language specification.

Here are some important points to remember about operator associativity and precedence in C:

• Associativity is only used when there are two or more operators of the same precedence.
• Associativity doesnt define the order in which operands of a single operator are evaluated.
• Precedence determines which operator is executed first if there is more than one operator in an expression.
• All the operators that have a similar level of precedence have the same associativity.