What is ? Is it infinite?

is a natural number. When "" is added to the traditional set of natural numbers, all the "operation rules" remain. For example, any two natural numbers in the new set of natural numbers {, 1, 2, …, n, …} can be added and multiplied.

and the operation result is still a natural number. At the same time, the associative law and commutative law of addition and multiplication operations and the distributive law of multiplication will not be affected. ?

However, it is controversial whether "" is included in the natural number. Some people think that the natural number is a positive integer, that is, counting from 1

; Others think that natural numbers are non-negative integers, that is, counting from .

Function of natural numbers:

Natural numbers play a great role in daily life, and people widely use them.

natural numbers are the earliest numbers in human history, and they are widely used in counting and measurement. People often use natural numbers to label or sort things, such as bus routes, house numbers, postal codes and so on.

natural numbers are integers (including positive integers and zeros), but not all integers are natural numbers. For example, -1 -2 -3 ... are integers, and natural numbers are infinite.