The difference is not a natural number unless the minuend is greater than or equal to the subtrahend.
If the minuend is less than the subtrahend, the difference will be a negative number.
If the minuend is less than the subtrahend, the difference will be a negative number.
简化这段文字: The difference is not a natural number unless the minuend is greater than or equal to the subtrahend. 输出: