What are the Arabic numerals?
The Arabic numerals are ten symbols, 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9, used for writing numbers. The term often implies a positional notation with a decimal base, especially when contrasted with Roman numerals.
Questions about Arabic numerals
Short answers, pulled from the story.
Where were the Arabic numerals designed?
The Arabic numerals were designed in North Africa and are a relatively recent development. Their immediate ancestors were introduced to Europe in the 10th century by Arabic speakers of Spain and North Africa.
Why are the Arabic numerals also called Hindu-Arabic numerals?
They are called Hindu-Arabic numerals because positional notation, though not these specific digit shapes, originated in India. The numerals also go by Western Arabic numerals, Western digits, European digits, Latin digits, and Ghubar numerals.
How did Fibonacci help spread the Arabic numerals in Europe?
Leonardo Fibonacci, a Pisan mathematician, learned the numerals in the trading colony of Bugia, now Bejaia in Algeria. His 1202 book Liber Abaci highlighted the advantages of positional notation and led to the numerals' widespread adoption in Europe.
When did the Arabic numerals replace Roman numerals in Europe?
By the mid-16th century the Arabic numerals had been widely adopted in Europe, and by 1800 they had almost completely replaced counting boards and Roman numerals in accounting. Roman numerals were relegated to niche uses such as years and clock faces.
Where does the word cipher come from in relation to Arabic numerals?
The word cipher comes from the Arabic term for zero, sifr, which was transliterated into Latin as cifra. Early Western texts used a placeholder called sipos, drawn as a circle or wheel, that foreshadowed the symbol for zero.
How are Arabic numerals encoded in computers?
The Arabic numerals are encoded in virtually all character sets, including ASCII, Unicode, and Morse code. In ASCII and Unicode, masking all but the four least-significant binary digits gives the value of the decimal digit, with 0 at U+0030 and 9 at U+0039.