
Roman numerals are a system of numerical notations used by the Romans.
It is based on letters which are assigned values as numerals.

Roman numerals cannot be negative or zero. Multiple symbols may be combined to produce numbers.
Lowercase letters are used to represent large numbers.
This is not standard practice.
Often a bar is placed above a Roman digit to indicate that is 1000 times larger than normal.
Standard Number 
Roman Number 

1 
I 
5 
V 
10 
X 
50 
L 
100 
C 
500 
D 
1000 
M 
5000 
v 
10000 
x 
50000 
l 
100000 
c 
500000 
d 
1000000 
m 
Roman numerals are commonly used today in clock faces, pages preceding the main body of a book,
music analysis, and successive political leaders or children having identical names.
