rue-eru/FCC-JS-2-roman-numeral-converter
Roman Numeral Converter | A simple project made for FreeCodeCamp's JavaScript Algorithms and Data Structures course
An old project build back in 2024 as the start of my journey and posted here to preserve my path.
A Roman numeral converter application — the second project in FreeCodeCamp's JavaScript Algorithms and Data Structures certification. Converts Arabic numbers (1-3999) into Roman numerals with proper subtraction notation (IV, IX, XL, XC, CD, CM).
The project only consists of JavaScript + HTML + CSS and was made as a part of FreeCodeCamp's JavaScript Algorithms and Data Structures course.
📋 Project Requirements
This project fulfills all 10 user stories from FreeCodeCamp's "Build a Roman Numeral Converter" challenge:
Click to expand the full requirements
User Stories:
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inputelement withid="number" -
buttonelement withid="convert-btn" -
div,span, orpelement withid="output" - Empty input →
"Please enter a valid number" - Number < 1 →
"Please enter a number greater than or equal to 1" - Number ≥ 4000 →
"Please enter a number less than or equal to 3999" -
9→"IX" -
16→"XVI" -
649→"DCXLIX" -
1023→"MXXIII" -
3999→"MMMCMXCIX"
All tests passed ✅
🎨 About the Project
The project only works in a range from 1 to 3999 so it didn't feel that hard as the Palindrome one. As far as I remember I especially liked the EventListener applying effects on pressing buttons back then. Still getting the logic right required more research to accomplish the project. It's a simple one function logic but still so sharp.
| Roman Numeral Converter Preview |
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🔗 Live Demo
| My official FreeCodeCamp JavaScript Algorithms and Data Structures Certificate |
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