Delphi Basics : Cardinal command

DelphiBasics

Cardinal
Type

The basic unsigned integer type

System unit

type Cardinal = 0..4294967295; // At the time of writing

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.

Notes

Cardinal is most commonly used in parameter passing to C type functions.

Related commands

Byte		An integer type supporting values 0 to 255
Int64		A 64 bit sized integer - the largest in Delphi
Integer		The basic Integer type
LongInt		An Integer whose size is guaranteed to be 32 bits
LongWord		A 32 bit unsigned integer
ShortInt		An integer type supporting values -128 to 127
SmallInt		An Integer type supporting values from -32768 to 32767
Word		An integer type supporting values 0 to 65535

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Example code : Showing the capacity of Cardinal

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;

Show full unit code

Min cardinal value = 0
Max cardinal value = 4294967295