Programming
programming
fundamentals
What is Binary?
Definition
Binary (base-2) is a numbering system that uses only two digits: 0 and 1. It is the fundamental representation of all data in computers — every file, instruction, and value is ultimately stored as sequences of binary digits (bits).
Why It Matters
Understanding binary is essential for bitwise operations, network subnetting, file formats, permissions (chmod 755 = 111 101 101), and encoding schemes. While developers rarely work in raw binary, the concept underpins all computing.