Question

what is natural numbers ​

Answer 1

Natural numbers are a part of the number system which includes all the positive integers from 1 till infinity and are also used for counting purpose.

It does not include zero (0). In fact, 1,2,3,4,5,6,7,8,9….etc. are also called counting numbers.

Answer 2

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In mathematics, the natural numbers are those used for counting and ordering. In common mathematical terminology, words colloquially used for counting are "cardinal numbers", and words used for ordering are "ordinal numbers".