Cardinal and ordinal numbers and numerals: zero, one, forty-two, 3.14, etc. Use this tag for questions related to numbers in the mathematical sense and expressions involving numbers. For questions about singular/plural, use [grammatical-number].
A cardinal number (or counting number) expresses a quantity: zero, one, two, three, etc. An ordinal number expresses the rank in a sequence: first, second, third, etc. A numeral is a way to write or express a number, either using words or using digits.
Use this tag for questions on forming numerals and how to use them. For questions about the grammatical notion of number (singular or plural), use the tag grammatical-number.
