Node:case, Next:CBoolean, Previous:Cardinal, Up:Reference
case expression of selector: statement; ... selector: statement; end;or, with alternative statement sequence:
case expression of
selector: statement;
...
selector: statement;
otherwise { ``else'' instead of ``otherwise'' is allowed }
statement;
...
statement;
end;
or, as part of the invariant record type definition:
foo = record field_declarations case bar: variant_type of selector: (field_declarations); selector: (field_declarations); ... end;or, without a variant selector field,
foo = record field_declarations case variant_type of selector: (field_declarations); selector: (field_declarations); ... end;
case opens a case statement. For further description see
case Statement.
For case in a variant record type definition, see Record Types.
The case statement is defined in ISO 7185 Pascal and
supported by all known Pascal variants.
According to ISO 7185 Pascal, the selector type must be a named type. UCSD Pascal and Borland Pascal allow any ordinal type here.
The alternative statement execution with otherwise it is an
Extended Pascal extension; with else it is a Borland Pascal
extension. In GNU Pascal, both are allowed.
program CaseDemo;
var
Foo: String (10);
Bar: Integer;
begin
WriteLn ('Enter up to ten arbitrary characters:');
ReadLn (Foo);
for Bar := 1 to Length (Foo) do
begin
Write (Foo[Bar], ' is ');
case Foo[Bar] of
'A' .. 'Z', 'a' .. 'z':
WriteLn ('an English letter');
'0' .. '9':
WriteLn ('a number');
otherwise
WriteLn ('an unrecognized character')
end
end
end.