What does the Roman numeral I represent?

The Roman numeral I represents the number one. In the Roman numeral system, characters represent specific values, and I is the symbol designated for one. It is the simplest Roman numeral, used frequently in various contexts, from clock faces to book chapters and outlines. Understanding Roman numerals is important not only for historical reasons but also for certain pharmaceutical contexts, where precise numerical representation is required. The other Roman numerals, such as V for five and X for ten, signify larger values, which further highlights how I specifically denotes the smallest unit value of one.