# Str

[![badge](https://img.shields.io/endpoint.svg?url=https%3A%2F%2Fgezf7g7pd5.execute-api.ap-northeast-1.amazonaws.com%2Fdefault%2Fsource_up_to_date%3Fowner%3Derg-lang%26repos%3Derg%26ref%3Dmain%26path%3Ddoc/EN/API/types/classes/Str.md%26commit_hash%3Dd15cbbf7b33df0f78a575cff9679d84c36ea3ab1)](https://gezf7g7pd5.execute-api.ap-northeast-1.amazonaws.com/default/source_up_to_date?owner=erg-lang&repos=erg&ref=main&path=doc/EN/API/types/classes/Str.md&commit_hash=d15cbbf7b33df0f78a575cff9679d84c36ea3ab1)

(不變長度)表示字符串的類型。 簡單的 `Str` 類型是刪除了字符數的 `StrWithLen N` 類型(`Str = StrWithLen _`)

## 方法

* isnumeric

返回字符串是否為阿拉伯數字。 使用 `isunicodenumeric` 判斷漢字數字和其他表示數字的字符(注意此行為與 Python 不同)。