What is Binary Code and How Does It Work?
Binary code is the foundational numerical language of modern computing. At its most fundamental hardware level, every digital computer operates using millions of microscopic semiconductor switches called transistors. These transistors can only exist in two distinct electrical states: ON (representing a state of high electrical voltage, symbolized by the digit 1) and OFF (representing a state of zero or low voltage, symbolized by the digit 0).
Because computers only understand these two states, they utilize the Base-2 (binary) numerical system rather than the human decimal (Base-10) system. A single binary digit is referred to as a bit. When eight bits are grouped together, they form a byte (such as 01000001). A byte provides 256 unique combinations (from 00000000 to 11111111), which is enough to encode every uppercase and lowercase English letter, punctuation mark, and numerical digit in standard ASCII format.