Save guides, add subjects and pick up where you left off with your BBC account. Roman numerals are a numeral system which was used in Ancient Rome. It uses letters instead of numbers to represent ...

So, in the spirit of retro-coding, let's build a script that can convert Roman numerals into regular decimal equivalent values. I know, you're saying "um, remind me, what are Roman numerals?", even ...

Like Roman numerals, their system borrowed letters; like the Arabic numerals we still use, it only needed one symbol for each decimal place. In the 6th century BCE, the Greek alphabet used 24 letters.

In my last article, I started digging in to a classic computer science puzzle: converting Roman numerals to Arabic numerals ... a specified Roman numeral and converted each value into its decimal ...