| Description |
The Cardinal type is an Integer whose size is not guaranteed. It is the basic unsigned integer type in Delphi, and currently has the same capacity as the LongWord : 32 bits.
To hold very large integers, use the Int64 type.
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| Notes |
Cardinal is most commonly used in parameter passing to C type functions.
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| Related commands |
| Byte |
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An integer type supporting values 0 to 255 |
| Int64 |
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A 64 bit sized integer - the largest in Delphi |
| Integer |
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The basic Integer type |
| LongInt |
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An Integer whose size is guaranteed to be 32 bits |
| LongWord |
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A 32 bit unsigned integer |
| ShortInt |
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An integer type supporting values -128 to 127 |
| SmallInt |
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An Integer type supporting values from -32768 to 32767 |
| Word |
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An integer type supporting values 0 to 65535 |
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| Example code : Showing the capacity of Cardinal |
// Full Unit code.
// -----------------------------------------------------------
// You must store this code in a unit called Unit1 with a form
// called Form1 that has an OnCreate event called FormCreate.
unit Unit1;
interface
uses
// The System unit does not need to be defined
SysUtils,
Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm} // Include form definitions
procedure TForm1.FormCreate(Sender: TObject);
var
min, max : Cardinal;
begin
// Set the minimum and maximum values of this data type
min := Low(Cardinal);
max := High(Cardinal);
ShowMessage('Min cardinalvalue = '+IntToStr(min));
ShowMessage('Max cardinalvalue = '+IntToStr(max));
end;
end.
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| Hide full unit code |
Min cardinal value = 0
Max cardinal value = 4294967295
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