Natural number
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In mathematics, the natural numbers are those used for counting (as in "there are six coins on the table") and ordering (as in "this is the third largest city in the country"). In common language, words used for counting are "cardinal numbers" and words used for ordering are "ordinal numbers".
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See also
- Integer
- Set-theoretic definition of natural numbers
- Peano axioms
- Canonical representation of a positive integer
- Countable set
- Number#Classification for other number systems (rational, real, complex etc.)
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