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(g77-300.info)Statement Labels

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Statement Labels
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   (Corresponds to Section 3.4 of ANSI X3.9-1978 FORTRAN 77.)

   A statement separated from its predecessor via a semicolon may be
labeled as follows:

   * The semicolon is followed by the label for the statement, which in
     turn follows the label.

   * The label must be no more than five digits in length.

   * The first digit of the label for the statement is not the first
     non-space character on a line.  Otherwise, that character is
     treated as a continuation character.

   A statement may have only one label defined for it.