V stands for Roman numerals and stands for the number 5. Roman numerals originated in ancient Rome and were used in Europe before Arabic numerals were introduced, but they are rarely used now. About 2500 years ago, the Romans were still in the early stage of cultural development, when they used fingers as a computing tool. In order to record these figures, people draw ⅰ, ⅱ and ⅲ on sheepskin. Roman numerals are a kind of numerals used in Europe before the introduction of Arabic numerals and actually Indian numerals.

V is a Roman numeral, which was used by Europeans before the introduction of Arabic numerals. It originated in Italy. At that time, seven Roman letters and specific symbols were used as counting units. I, V, X, C, M, L and D represent one, five, ten, one hundred, one thousand, fifty and five hundred respectively. There was no number 0 in the early days. In 750 AD, it was decided to use the letter n to represent the number 0.