Which operator performs a logical AND operation?

• A. ||
• B. &&
• C. &
• D. and

Answer: (B)

Logical AND checks that both conditions are true. The symbol that performs this operation in most programming languages is the double ampersand. It yields true only when both operands are true, and it can short-circuit, meaning it may skip evaluating the second operand if the first is false. This makes it ideal for combining two conditions, like if (a > 0 && b > 0) { … }. The other options do different things: the double pipe is OR, which is true if at least one side is true; the single ampersand is usually a bitwise AND that works on numbers at the bit level rather than booleans; and the word and is used as a keyword in some languages for conjunction but is not the symbol typically used to express logical AND in common syntax.