# 內置程序

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## id！

返回對象的唯一標識號。
盡管在純 Erg 語義中，結構相同的對象之間沒有區別，但實際上對象在內存中具有不同的位置。
`id!` 返回一個代表這個位置的數字。

```python
```

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