JavaScript Learning-identifiers, keywords, reserved words

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* Identifiers

The so-called identifier refers to a variable, function, attribute name, or function parameter.

The first character must be a letter, a glide line, and a dollar sign.

Other characters can be letters, glide lines, dollar signs, or numbers.

* Key Words

Keywords are used to denote the start and end of a control statement, or to perform a specific operation. cannot be used as an identifier.

1 <Script>2      var        New         instanceof       typeof3      Try        Catch       Throw            finally     4      return     void        Continue          for         5      Switch      Case         Break            default    6       Do          while       Debugger         function    7       This        with        if               Else                8      inch         Delete          9 </Script>

* Reserved words

Another set of reserved words that cannot be used as identifiers is likely to be used as a keyword in the future. ECMA-262 all reserved words as defined in version 3rd:

1      abstract    enum        int          2     boolean     export      interface    static  3     byte        extends     long         Super4     Char        final       native       synchronized5     class       float       package      throws 6      const       goto        Private      transient7public      implements  protected    volatile8      double      import      public

JavaScript Learning-identifiers, keywords, reserved words