Challenge: Roman numerals!

Question

Need to write a function that takes arabic numerals and return the roman numerals.

Roman numerals:
I = 1
V = 5
X = 10
L = 50
C = 100
D = 500
M = 1000

Example:
10 -> X
6 -> VI
76 -> LXXVI
499 -> CDXCIX
...

Precondition:
Input: integer (0 < input < 3999)
Output: string

Please set the language in comment!!!

If you resolve this task set plus!!!

Answer 1

Inline assembly:
https://code.sololearn.com/cXqZjdjBKqGu/?ref=app

Answer 2

Onliner 😊
https://code.sololearn.com/c95Y62c4p1dV/?ref=app

Answer 3

https://code.sololearn.com/cLOi9wpPOJjF/?ref=app

Works between 1-4000000(excluded)

Answer 4

https://code.sololearn.com/c2E37k10vS2y/?ref=app

Answer 5

https://code.sololearn.com/cSl9R9bLoLcd/?ref=app

Answer 6

https://code.sololearn.com/co4RsqM8ryVm/?ref=app

Answer 7

Here is my attempt in Python:
https://code.sololearn.com/c4CctDZ2Iiik/#py

Answer 8

My first code ever, in Python 3:

https://code.sololearn.com/cF88oyMa3W15/#py

If you have any comments, let me know!

Answer 9

c#
https://code.sololearn.com/c4lgtSJHyy51/?ref=app

Answer 10

My try in PHP :
https://code.sololearn.com/wxN8Wu6W58Cm/#php

I hope you'll understand my technical comment in english ;)

I notice that Roman numerals work by pairs "unit" and "five" for every decimal in base10 (I and V, X and L, ...).

I use base5 conversion for every base10 position.
+ a test when last number (unit) is 4 in base5 : in that case I use 1 unit before the next letter depending on the next col in base5 (0 or 1) thus "five" or next unit.

The second function is only for formating purpose while testing.

Answer 11

My try on python.
1. a integer to roman numeral, work between 0 to 3999.
https://code.sololearn.com/caBR7zasyKVz/#py
2. roman numeral convert to integer.
https://code.sololearn.com/c9fmB9cIaS3Q/#py

Answer 12

Very quickly?! You did that before?

Answer 13

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