What is the use of AND gate in half subtractor?

In a half subtractor, the AND gate is used to determine when a borrow is needed during the subtraction process. Specifically, it outputs a high signal (1) if the minuend (the first input) is 0 and the subtrahend (the second input) is 1, indicating that a borrow is required to complete the subtraction. This functionality is essential for accurately representing the subtraction of binary numbers.