Roman Numerals
Intermediate · Write the code · from 50 Python Practice Problems with Instant Answer Checking (Beginner to Advanced)
From the lesson: 50 Python Practice Problems with Instant Answer Checking (Beginner to Advanced)
Fifty problems, each with a code editor and real tests. Write your solution, press Check, and see exactly which cases pass. Stuck? Hints reveal one at a time, and the solution unlocks once you have checked at least once. Your code and progress are saved in this browser.
Read the lessonWrite to_roman(n) that converts an integer from 1 to 3999 into Roman numerals, including the subtractive forms like IV (4), IX (9), XL (40) and CM (900).
def to_roman(n):
pass
Solution unlocks after your first Check
What Check runs
Your code runs first, then each of these lines. The output must match exactly.
| Runs | Expected output |
|---|---|
| to_roman(4) | 'IV' |
| to_roman(1994) | 'MCMXCIV' |
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