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(g77-300.info)Construct Names

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Construct Names
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   The GNU Fortran language supports construct names as defined by the
Fortran 90 standard.  These names are local to the program unit and are
defined as follows:

     CONSTRUCT-NAME: BLOCK-STATEMENT

Here, CONSTRUCT-NAME is the construct name itself; its definition is
connoted by the single colon (`:'); and BLOCK-STATEMENT is an `IF',
`DO', or `SELECT CASE' statement that begins a block.

   A block that is given a construct name must also specify the same
construct name in its termination statement:

     END BLOCK CONSTRUCT-NAME

Here, BLOCK must be `IF', `DO', or `SELECT', as appropriate.