using {0,1} numbers as well.
most common system used is 'decimal notation', developed probably because of number of fingers.
there are other notations, for example:
- unsigned binary, that uses only two numbers: {0, 1},
- octal, that uses: {0, 1, 2, 3, 4, 5, 6, 7},
- hexadecimal, that uses: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F},
- signed binary (in many forms), that use: {0, 1}.
| Decimal | Unsigned Binary | Octal | Hexadecimal |
| 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 1 |
| 2 | 10 | 2 | 2 |
| 3 | 11 | 3 | 3 |
| 4 | 100 | 4 | 4 |
| 5 | 101 | 5 | 5 |
| 6 | 110 | 6 | 6 |
| 7 | 111 | 7 | 7 |
| 8 | 1000 | 10 | 8 |
| 9 | 1001 | 11 | 9 |
| 10 | 1010 | 12 | A |
| 11 | 1011 | 13 | B |
| 12 | 1100 | 14 | C |
| 13 | 1101 | 15 | D |
| 14 | 1110 | 16 | E |
| 15 | 1111 | 17 | F |
| 16 | 10000 | 20 | 10 |
| 17 | 10001 | 21 | 11 |
see also, if You wish: Signed number representations.
(to be elaborated as time & mind state allows)
