# REPL

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运行不带参数的 `erg` 命令会调用 REPL。 它也可以用 `repl` 子命令调用。
此外，您可以指定以下标志：

* show-type：显示对象及其类型。

```console
$ erg repl --show-type
Erg interpreter ... (tags/?:, ...) on ...
>>> 1
1: {1}
>>> id x = x
id = <function id>: |T: Type| T -> T
```
