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Why do people slowly regard 0 as a natural number in the history of mathematics? . When counting, it doesn't start with 0. Why?
This makes sense, because 0 means no.

In primitive daily life, there is no addition at the beginning and no subtraction at the end, so 0 is essential when counting.

Modern science and technology embodies the natural number status of 0, such as telephone number. The unit numbers do not start from 1, but from 0. ......