How are negative real numbers represented in a computer?

Question

Java

Interested in how negative real numbers are represented in computer memory.
The positive ones are understandable. The whole part is translated as an ordinary whole. And according to the algorithm, we multiply the mantissa by 2 if ...
And how are negative real numbers represented?
How to translate them from 10 ss to 2 ss?

Answer 1

Just like integers, one bit is given per sign. The Russian Wikipedia is somehow scarce, there is in English . In general, the standard is called IEEE 754.

Answer 2

habrahabr.ru/post/112953
You also wrote something strange about the positive ones.