1
A block_statement encloses a handled_sequence_of_statements optionally preceded by a declarative_part.
2
block_statement::=
[block_statement_identifier:]
[declare
declarative_part]
begin
handled_sequence_of_statements
end [block_identifier];
3
If a block_statement has a block_statement_identifier, then the identifier shall be repeated after the end; otherwise, there shall not be an identifier after the end.
4
A block_statement that has no explicit declarative_part has an implicit empty declarative_part.
5
The execution of a block_statement consists of the elaboration of its declarative_part followed by the execution of its handled_sequence_of_statements.
6
Example of a block statement with a local variable:
7
Swap: declare Temp : Integer; begin Temp := V; V := U; U := Temp; end Swap;