# Fundamentals of Data Representation: Units of information - Unsigned binary

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## Unsigned Binary[edit]

Up to this point you have only been working with whole positive numbers represented as **unsigned binary** patterns. You can also represent negative values as **signed binary** and real numbers with fractional parts or decimal places. Before you start real numbers check you understand unsigned binary by recapping 1 and 2 below.

- Number bases - For converting between binary, decimal and Hexadecimal.
- Bits and bytes - To see how to calculate the munimum and maximum values for a given number of bits (in unsigned binary).
- Two's complement - How negative values are represented as signed binary.
*We will cover this further on.*