A decimal digit is one of the ten digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 used in the decimal numeral system. Their standard written forms are the Arabic numerals.
In a decimal expansion, a decimal digit 
in a position with place value 
contributes 
to the represented number,
where 
is an integer. For example, the decimal
expansion 375.4 has four decimal digits and represents
 |
A decimal digit is distinct from its position and its contribution to the number. The decimal digit 7 in this example occupies the tens place and contributes 70, while the same decimal digit in the units place would contribute 7. The decimal point separates the units and tenths places and is not a decimal digit.
The corresponding symbols in the binary numeral system are the binary digits 0 and 1. Their place values are powers of 2 instead of powers of 10.
