0 is the smallest non-negative integer. Gong Pil-seong, a leading player with number 0 in the 1990s and 2000s, had no choice but to change his uniform number during his third year as a professional. 0 is the smallest non-negative integer.
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It was thought that 0, that is, without anything, was meaningless and therefore not a number. In this respect, compared to other numbers from 1 to 9, 0 is definitely. In mathematical terminology, 0 is the additive identity.
From the beginning, number was thought to have been created to 'count' the number of objects.
However, in other cases, 0 can be defined as a natural number. 0 (zero) is a number representing an empty quantity. Natural numbers may or may not include 0, but this does not affect the fact that 0 is an integer. So can factorial only be defined in 0 and positive integers?
Adding (or subtracting) 0 to any number leaves that number unchanged; The natural number next to 0 is 1, and 0 is not the next natural number. In the KBO league, No. 0 Gong Pil-seong and Kim Kang-min, and No. 0 Kim Gyeong-gi can be said to be representative examples. Natural numbers may or may not include 0, but the fact that 0 is an integer.
Euler, a Swiss mathematician in the 18th century, expanded the factorial to be defined in all numbers, like this.
However, when writing numbers, because the number of strokes is complicated, it is usually replaced with a simplified round shape, 〇. Just as 1, 2, 3 are 一, 2, 3 in Chinese characters, 0 is ‘zero’ in Chinese characters. But it doesn't say '0 apples'. Even outside the framework of numbers, 0 was excluded from operations such as addition and multiplication.
Zero, represented by the number 0, is the basic structure of the number system. The concept of zero, which seems simple and intuitive today, has a rich and complex history spanning centuries and cultures. The natural number next to 0 is 1, and 0 is not the next natural number.
