Editing Hexadecimal (section)

===Signs===
The hexadecimal system can express negative numbers the same way as in decimal: −2A to represent −42<sub>10</sub>, −B01D9 to represent −721369<sub>10</sub> and so on.

Hexadecimal can also be used to express the exact bit patterns used in the [[central processing unit|processor]], so a sequence of hexadecimal digits may represent a [[signedness|signed]] or even a [[floating-point arithmetic|floating-point]] value. This way, the negative number −42<sub>10</sub> can be written as FFFF&nbsp;FFD6 in a 32-bit [[Processor register|CPU register]] (in [[two's complement]]), as C228&nbsp;0000 in a 32-bit [[Floating-point unit|FPU]] register or C045&nbsp;0000&nbsp;0000&nbsp;0000 in a 64-bit FPU register (in the [[IEEE floating-point standard]]).