What is a natural number?

Leonid Veselov
Leonid Veselov
August 14, 2012
What is a natural number?

Definition What is a natural number? This is the number that occurs when counting in a natural way (in the process of listing or calculating).

To determine what is a natural number, there are two approaches:

  1. The numbers we use when numbering items.
    for example: the first car, the second car, the third car.
  2. 2. The numbers that we use when we need to denote the number of objects.
    for example: one kiwi, two kiwis.

All natural numbers make up the set, which is denoted by the sign N.

Now that we know what a natural number is, we can talk to other numbers. In addition to the natural there are also rational, integer, etc.

For example, rational is a number that looks like an irreducible ordinary fraction. This fraction has an integer in the numerator, and the denominator is a natural number.

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