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Unsigned Binary Arithmetic
Unsigned binary numbers are, by definition, positive numbers and thus do not require an arithmetic sign. An m-bit unsigned number represents all numbers in the range 0 to 2m − 1.
For example, the range of 8-bit unsigned binary numbers is from 0 to 25510 in decimal and from 00 to FF16 in hexadecimal.
Further Reading
https://www.tutorialspoint.com/unsigned-and-signed-binary-numbers