Know that:
- the bit is the fundamental unit of information
- a byte is a group of 8 bits.
A bit is the fundamental unit of information and is represented as either a 0 or 1. A group of 8 bits is called a byte.
Know that the 2n different values can be represented with n bits.
2n different values can be represented using n bits however the maximum value is 2n - 1.
Example
The 8 values which can be represented using 3 bits are:
| Value | Binary |
|---|---|
| 0 | 000 |
| 1 | 001 |
| 2 | 010 |
| 3 | 011 |
| 4 | 100 |
| 5 | 101 |
| 6 | 110 |
| 7 | 111 |