What is the unary operator performing logical negation?

In Python, the unary operator that performs logical negation is "Not." This operator is applied to a single boolean expression and effectively reverses its truth value. If the expression is True, applying the "Not" operator results in False, and if the expression is False, it results in True.

For example, not True evaluates to False, whereas not False evaluates to True. This makes "Not" a fundamental tool in controlling the flow of logic within programs, allowing for conditional behaviors based on negating existing boolean conditions.

In contrast, the other operators mentioned in the options operate differently. "And" and "Or" are binary logical operators that combine two boolean expressions: "And" requires both expressions to be true for the overall result to be true, while "Or" requires at least one expression to be true. "Xor" (exclusive or) is also a binary operator that returns true if and only if one of the two input expressions is true, but not both. Thus, these options do not meet the criteria of a unary operator or perform logical negation.