The precedence of the operators determines the evaluation sequence on expression.
The following table shows the order of precedence for all the operators in C, from highest at the top to lowest at the bottom.
Precedence Operators Description Associativity 1 ( ) Parenthesized expression Left to right  Array subscript . Member selection by object -> Member selection by pointer ++ -- Postfix increment and prefix decrement 2 + - Unary + and - Right to left ++ -- Prefix increment and prefix decrement ! ~ Logical NOT and bitwise complement * Dereference (also called indirection operator) & Address-of sizeof Size of expression or type (type) Explicit cast to type such as (int) or (double) 3 * / % Multiplication and division and modulus (remainder) Left to right 4 + - Addition and subtraction Left to right 5 << >> Bitwise shift left and bitwise shift right Left to right 6 < <= Less than and less than or equal to Left to right > >= Greater than and greater than or equal to 7 == != Equal to and not equal to Left to right 8 & Bitwise AND Left to right 9 ^ Bitwise exclusive OR Left to right 10 | Bitwise OR Left to right 11 && Logical AND Left to right 12 || Logical OR Left to right 13 ?: Conditional operator Right to left 14 = Assignment Right to left += -= Addition assignment and subtraction assignment /= *= Division assignment and multiplication assignment %= Modulus assignment <<= >>= Bitwise shift left assignment and bitwise shift right assignment &= |= Bitwise AND assignment and bitwise OR assignment ^= Bitwise exclusive OR assignment 15 , Comma operator Left to right