Hex Digits
Each hex digit represents 4 binary bits (a nibble). This makes hex useful for compactly representing binary data.
| Hex | Decimal | Binary |
|---|---|---|
| 0 | 0 | 0000 |
| 1 | 1 | 0001 |
| A | 10 | 1010 |
| F | 15 | 1111 |
Fundamentals: Hexadecimal Numbers
Hexadecimal (base-16) uses digits 0–9 and letters A–F. It’s often used as a shorthand for binary.
Why Hex is Useful
Hex makes binary easier to read for humans. For example, 11111111 in binary is just FF in hex. It’s widely used in memory addresses, colour codes, and machine code.