What does || mean?

What does || mean?

• A. Logical XOR; true only when exactly one expression is true
• B. Logical NOT; negates a Boolean expression
• C. Logical OR; true when at least one expression is true
• D. Logical AND; true only when both expressions are true

Answer: (C)

The symbol || is the logical OR operator. It evaluates to true when at least one of the operands is true. Its behavior covers all combinations except when both operands are false, so true || true, true || false, and false || true are true, while false || false is false. In many languages it also short-circuits, meaning if the first operand is true, the second may not be evaluated. For example, true || false is true, and a condition like (x > 10) || (y == 0) is true as long as either part holds. The other options describe different operators: XOR is true only when exactly one side is true; NOT negates a single value; AND is true only when both sides are true.

The symbol || is the logical OR operator. It evaluates to true when at least one of the operands is true. Its behavior covers all combinations except when both operands are false, so true || true, true || false, and false || true are true, while false || false is false. In many languages it also short-circuits, meaning if the first operand is true, the second may not be evaluated. For example, true || false is true, and a condition like (x > 10) || (y == 0) is true as long as either part holds. The other options describe different operators: XOR is true only when exactly one side is true; NOT negates a single value; AND is true only when both sides are true.