digit
A position in the number of numbers in a number. The number of parts of the integer part from the right, every four is a level, the level includes a bit, ten, hundred and thousands, that how many one; million, including million, one hundred thousand, one million and 10 million, that the number of million; billion, including billion, billion, billion and 100 billion, said how many million ... ... the fractional part of the number from the left to the right in order, Thousands of bits ... how many one tenth, one percent, one thousandths ...