Binary numbers are a base-2 number system that uses only two digits, 0 and 1, to represent numbers. In binary, each digit represents a power of 2, rather than a power of 10 as in the decimal system. This makes it particularly useful in computing, as it can easily represent the on/off states of digital circuits. Each digit in a binary number is called a bit, and a group of 8 bits is called a byte.
