one byte
If you mean 100,000,000 (9 digits) then its called one hundred millionif you ment 1,000,000,000 (10 digits but 9 zero's)then its called a billion
It's called 'rounding' - either up or down.
The digits that are reported in an answer are called significant figures.
Decimal
Terminating Decimal
significant digits. for short they are called "sig. figs."
Significant Digits.
significant digits
repeating or recurring decimals
It is a decimal fraction.
toes or fingers are also called digits.