Is 0 a natural number? Why?

Natural number refers to the number used to measure the number of things or to indicate the order of things. That is, the numbers represented by the numbers 0, 1, 2, 3, 4 ... Natural numbers start from 0 and form an infinite group one by one. Natural numbers are ordered and infinite. Divided into even and odd numbers, composite numbers and prime numbers.

Abroad, textbooks in some countries count 0 as a natural number. This is an artificial rule. In order to implement the international standards formulated by the International Organization for Standardization (ISO), China defines natural number set as containing element 0, and also to integrate with international standards as soon as possible. 0 is the smallest natural number. 0, all "operation rules" remain unchanged.

Introduction to the characteristics of 0

1 and 0 are neither prime numbers (prime numbers) nor composite numbers.

2.0 is neither positive nor negative, but the dividing point between positive and negative numbers.

3,0 is the smallest complete square number.

4, 0 is even.

The square root of 5.0 is 0, and the cube root of 0 is also 0.

The opposite of 6 and 0 is 0, and the absolute value is itself.

7,0 divided by any real number equals 0, and any real number plus 0 equals itself.

8,0 has no reciprocal and negative reciprocal, a non-zero number divided by 0 has no meaning in the real number range, and 0 divided by 0 has infinite solutions.

9,0 cannot appear as a denominator or divisor in a fraction.

10, 0 times of any number is equal to 0, and the power of 0 of any number except 0 is equal to 1.

Reference to the above content: Baidu Encyclopedia -0