Fractional part
Excess of a non-negative real number beyond its integer part / From Wikipedia, the free encyclopedia
The fractional part or decimal part[1] of a non‐negative real number is the excess beyond that number's integer part. The latter is defined as the largest integer not greater than x, called floor of x or
. Then, the fractional part can be formulated as a difference:
.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/6/64/Parte_fraccionaria.png/320px-Parte_fraccionaria.png)
For a positive number written in a conventional positional numeral system (such as binary or decimal), its fractional part hence corresponds to the digits appearing after the radix point. The result is a real number in the half-open interval [0, 1).