Name
Case Keyword
Syntax
caseOrdinal
expression
ofOrdinal
range
:Statement
;Ordinal
range
,Ordinal
range
, ...:Statement
elseStatements
...; end; typeName
= recordDeclarations
... caseOrdinal
type
ofOrdinal
range
: (Declarations
...);Ordinal
range
,Ordinal
range
, ...: (Declarations
...); end; typeName
= recordDeclarations
... caseMemberName
:Ordinal
type
ofOrdinal
range
: (Declarations
...);Ordinal
range
,Ordinal
range
, ...: (Declarations
...); end;
Description
The case
statement
selects one branch out of many possible branches, depending on the
value of an ordinal-type expression. Delphi’s
case
statement extends that of standard Pascal by
including the optional else
condition. If no other
case matches the expression, Delphi executes the
else
statements. The else
clause is similar to the otherwise
clause found in
other Pascal extensions.
The case
keyword can also be used in a record type
declaration, to declare a variant record. See the
record
keyword for
details.
The type of the case expression must be an ordinal type, that is,
integer, character, or enumeration. Each case selector must be a
constant expression of the appropriate type or a constant range
(constant
..
constant
).
The cases can be in any order, but the else
clause
must be last. Case selectors must be unique. Each case must have a
single statement, except that you can have many statements after the
else
.
Tips and Tricks
If the case expression is an enumerated type, and the cases cover all possible values of the type, ...
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