noun
cardinal number
In mathematics, a number used for counting (one, two, three...) as opposed to ordinal numbers (first, second, third...).
基数と序数の違いを説明してください。
Please explain the difference between cardinal and ordinal numbers.
In a numeral system, the number of unique digits used to represent numbers (e.g., base 10 for decimal, base 2 for binary).
コンピューターは基数が2の二進法を使う。
Computers use the binary system, which has a base of 2.