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                # ECMAScript 關鍵字 **本節提供完整的 ECMAScript 關鍵字列表。** ## ECMAScript 關鍵字 ECMA-262 定義了 ECMAScript 支持的一套_關鍵字(keyword)_。 這些關鍵字標識了 ECMAScript 語句的開頭和/或結尾。根據規定,關鍵字是保留的,不能用作變量名或函數名。 下面是 ECMAScript 關鍵字的完整列表: ``` break case catch continue default delete do else finally for function if in instanceof new return switch this throw try typeof var void while with ``` 注意:如果把關鍵字用作變量名或函數名,可能得到諸如 "Identifier Expected"(應該有標識符、期望標識符)這樣的錯誤消息。
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