In C, which character represents the logical NOT operation?

The logical NOT operation in C is represented by the exclamation mark character, which is !. This operator is used to reverse the truth value of its operand. For instance, if you have a boolean expression that evaluates to true (non-zero), applying the logical NOT operator will change it to false (0), and vice versa.

Using the logical NOT operator is essential in control flow statements and conditional expressions. For example, in an if statement, you can check for the opposite of a condition by using this operator, which is a common practice in C programming.

The other characters listed do not represent the logical NOT operation. The percent sign (%) is used for the modulo operation, the caret (^) represents the bitwise XOR operation, and the ampersand (&) is used for the bitwise AND operation. Hence, the exclamation mark is uniquely qualified for negating boolean values in C.