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The Roman Numeral Converter project was created as a certification requirement for the JavaScript Algorithms and Data Structures course from freeCodeCamp. The objective was to build an application that converts Hindu-Arabic numbers into Roman numerals, similar to the example provided. The app provides accurate conversion of numbers within the range of 1 to 3999 and handles invalid inputs properly.

Important

This project is part of the freeCodeCamp JavaScript Algorithms and Data Structures course. Although freeCodeCamp provides guidelines and user stories for certification projects, it does not offer tutorials or step-by-step guides for development. This project was built entirely from scratch using my own approach to meet the requirements.

Screenshot

Project's screenshot

📝 Project Objective

The objective of this project was to develop an application that converts Hindu-Arabic numerals into Roman numerals, similar to this example. The app needed to handle various input scenarios, including invalid inputs, numbers out of range, and valid conversions. This project provided an opportunity to practice some JavaScript techniques, particularly recursion, which was a key focus in the second module of the freeCodeCamp JavaScript Algorithms and Data Structures course.

🔧 Features

  • Input Field: An input element with id number for users to enter a number.

  • Convert Button: A button element with id convert-btn that triggers the conversion process.

  • Output Display: A div element with id output that shows the Roman numeral representation of the entered number or an error message.

  • Validation and Alerts: Handles invalid input with appropriate messages for cases such as empty input, numbers less than 1, or numbers greater than 3999.

  • Conversion Logic: Uses recursion and a list of Roman numeral symbols to convert numbers to Roman numerals.

📖 Learnings

  • Recursion: Implemented recursive functions to handle the conversion process efficiently.

  • DOM Manipulation: Gained more experience in manipulating DOM elements and handling user interactions.

  • Error Handling: Applied validation techniques to manage different types of user input and display appropriate messages.

  • Algorithm Design: Developed an understanding of how to design algorithms for numeral conversions and other complex logic.

💻 Technologies Used

  • HTML5 for structuring the application.

  • CSS3 for styling and providing visual feedback.

  • JavaScript for functionality, including DOM manipulation, recursion, and input validation.

💡 Acknowledgments

  • freeCodeCamp: For providing the project guidelines and user stories that served as the basis for this application.

  • Ceptari Tyas: For the design inspiration, found here: Dribbble - Binary Converter Darkmode.