IV- Boolean Logic Operator

IV- Boolean Logic Operator

The logical Boolean operators perform logical operations with bool operands. The operators include the unary logical negation (!), binary logical AND (&), OR (|), and exclusive OR (^), and the binary conditional logical AND (&&) and OR (||).

- Unary ! (logical negation) operator.

- Binary & (logical AND), | (logical OR), and ^ (logical exclusive OR) operators. Those operators always evaluate both operands.

- Binary && (conditional logical AND) and || (conditional logical OR) operators. Those operators evaluate the right-hand operand only if it's necessary.

For operands of the integral numeric types, the &, |, and ^ operators perform bitwise logical operations. For more information, see Bitwise and shift operators.

Logical AND operator &

The & operator computes the logical AND of its operands. The result of x & y is true if both x and y evaluate to true. Otherwise, the result is false.

The & operator evaluates both operands even if the left-hand operand evaluates to false, so that the operation result is false regardless of the value of the right-hand operand.

Conditional logical AND operator &&

The conditional logical AND operator &&, also known as the "short-circuiting" logical AND operator, computes the logical AND of its operands. The result of x && y is true if both x and y evaluate to true. Otherwise, the result is false. If x evaluates to false, y isn't evaluated.

Logical OR operator |

The | operator computes the logical OR of its operands. The result of x | y is true if either x or y evaluates to true. Otherwise, the result is false.

The | operator evaluates both operands even if the left-hand operand evaluates to true, so that the operation result is true regardless of the value of the right-hand operand.

Logical NOT operator (!)

The NOT operator is a unary operator, as it operates on a single operand. The NOT operator inverts the value of a Boolean value. If the original value is true then the returned value is false; if the original value is false, the return value is true. The NOT operation is often known as the binary complement.

Logical exclusive OR operator ^

The ^ operator computes the logical exclusive OR, also known as the logical XOR, of its operands. The result of x ^ y is true if x evaluates to true and y evaluates to false, or x evaluates to false and y evaluates to true. Otherwise, the result is false. That is, for the bool operands, the ^ operator computes the same result as the inequality operator !=.

Conditional logical OR operator ||

The conditional logical OR operator ||, also known as the "short-circuiting" logical OR operator, computes the logical OR of its operands. The result of x || y is true if either x or y evaluates to true. Otherwise, the result is false. If x evaluates to true, y isn't evaluated.

Nullable Boolean logical operators

For bool? operands, the & (logical AND) and | (logical OR) operators support the three-valued logic as follows:

• The & operator produces true only if both its operands evaluate to true. If either x or y evaluates to false, x & y produces false (even if another operand evaluates to null). Otherwise, the result of x & y is null.

• The | operator produces false only if both its operands evaluate to false. If either x or y evaluates to true, x | y produces true (even if another operand evaluates to null). Otherwise, the result of x | y is null.