Delphi Basics : Int64 command

DelphiBasics

Int64
Type

A 64 bit sized integer - the largest in Delphi

System unit

type Int64 = -9223372036854775808..9223372036854775807;

Description

The Int64 type is a 64 bit signed Integer. This size is fixed, and will not change in future releases of Delphi.

Functions such as IntToStr support Int64 (via overloading).

Integer constants are cast to Int64 type when they exceed Integer size.

Notes

UInt64, the unsigned version of Int64 appears in Delphi after Delphi 7, it appears.

Related commands

Byte		An integer type supporting values 0 to 255
Cardinal		The basic unsigned integer type
Integer		The basic Integer type
LongInt		An Integer whose size is guaranteed to be 32 bits
LongWord		A 32 bit unsigned integer
PInt64		Pointer to an Int64 value
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

Download this web site as a Windows program.

Example code : Showing the capacity of Int64

var
  min, max : Int64;
begin
  // Set the minimum and maximum values of this data type
  min := Low(Int64);
  max := High(Int64);
  ShowMessage('Min int64 value = '+IntToStr(min));
  ShowMessage('Max int64 value = '+IntToStr(max));
end;

Show full unit code

Min int64 value = -9223372036854775808
Max int64 value = 9223372036854775807