In mathematics and computer science, a numerical digit is a symbol, e.g. 3, used in numerals (combinations of symbols), e.g. 37, to represent numbers (integers or real numbers) in positional numeral systems. (The name comes from the fact that the 10 fingers correspond to the 10 digits in the common base 10 number system, ie a decimal digit). Wikibooks Wikiversity has more about this subject: School of Mathematics Wikiquote has a collection of quotations related to: Mathematics Look up Mathematics on Wiktionary, the free dictionary Wikimedia Commons has more media related to: Mathematics Bogomolny, Alexander: Interactive Mathematics Miscellany and Puzzles. ... Wikibooks Wikiversity has more about this subject: School of Computer Science Open Directory Project: Computer Science Downloadable Science and Computer Science books Collection of Computer Science Bibliographies Belief that title science in computer science is inappropriate Categories: Computer science ... A numeral is a symbol or group of symbols that represents a number. ... A number is an abstract entity used originally to describe quantity. ... The integers consist of the positive natural numbers (1, 2, 3, …), their negatives (−1, −2, −3, ...) and the number zero. ... In mathematics, the real numbers are intuitively defined as numbers that are in one-to-one correspondence with the points on an infinite line—the number line. ... Positional notation is a system in which each position has a value represented by a unique symbol or character. ... A numeral is a symbol or group of symbols that represents a number. ...

Examples of digits include any one of the decimal characters "0" through "9", either of the binary characters "0" or "1", and the digits "0"..."9","A",...,"F" used in the hexadecimal system. In a given number system, if the base (radix) is an integer, the number of needed digits, including zero, is always equal to the absolute value of the base. The binary numeral system represents numeric values using two symbols, typically 0 and 1. ... In mathematics and computer science, hexadecimal, or simply hex, is a numeral system with a radix or base of 16 usually written using the symbols 0–9 and A–F or a–f. ... The radix (Latin for root), also called base, is the number of various unique symbols (or digits or numerals) a positional numeral system uses to represent numbers. ... In mathematics, the absolute value (or modulus1) of a real number is its numerical value without regard to its sign. ...

(Source: Federal Standard 1037C) Federal Standard 1037C entitled Telecommunications: Glossary of Telecommunication Terms is a U.S. Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended. ...