noun
Used in mathematics and computing to refer to the base of a numeral system, such as 10進数 (decimal) or 2進数 (binary).
コンピューターは2進数で計算する。
Computers calculate in binary (base 2).
10進数は日常生活で最もよく使われる。
The decimal system (base 10) is the most commonly used in daily life.