Arabic numerals Arabic numerals Arabic numerals, also called Hindu–Arabic numerals, are the ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9; or numerals written using them in the Hindu–Arabic numeral system (where the position of a digit indicates the power of 10 to multiply it by). It is the most common system for the symbolic representation of numbers in the world today. The Hindu-Arabic numeral system was developed by Indian mathematicians around AD 500 using quite different forms of the numerals. From India, the system was adopted by Arabic mathematicians in Baghdad and passed on to the Arabs farther
Numerals in Unicode three Unicode characters semantically represent mathematical constants: , the , and . Other mathematical constants can be represented using characters that have multiple semantic uses. For example, although Unicode includes a character for "natural exponent" ℯ (U+212F) its UCS canonical name derives from its glyph: ; and the mathematical constant π, 3.141592.., is represented by . The Western Arabic numerals also appear among the compatibility characters as rich text variant forms including bold, double-struck, monospace, sans-serif and sans-serif bold. and fullwidth variants for legacy vertical text support. Rich text parenthesized, circled and other variants are also included in the blocks: