Not true. Modern architectures use 2s-complement rather than an explicit sign bit to represent integers. If you use a sign bit, there are two different zeros (positive and negative) but the range of positive numbers is exactly as large as the range of negative numbers. With 2s-complement, there's only one zero and the range of negative numbers is larger (by one) than the range for positive numbers.
Not true. Modern architectures use 2s-complement rather than an explicit sign bit to represent integers. If you use a sign bit, there are two different zeros (positive and negative) but the range of positive numbers is exactly as large as the range of negative numbers. With 2s-complement, there's only one zero and the range of negative numbers is larger (by one) than the range for positive numbers.