DelphiBasics
Integer
Type
The basic Integer type System unit
  type Integer = -2147483648..2147483647;  // At the time of writing
Description
The Integer type is an Integer whose size is not guaranteed. It is the basic integer type in Delphi, and currently has the same capacity as the LongInt type - 1 bit sign, and 31 bits value.
 
To hold very large integers, use the Int64 type.
Related commands
Byte An integer type supporting values 0 to 255
Cardinal The basic unsigned integer type
Int64 A 64 bit sized integer - the largest in Delphi
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 Integer
var
  min, max : Integer;
begin
  // Set the minimum and maximum values of this data type
  min := Low(Integer);
  max := High(Integer);
  ShowMessage('Min integer value = '+IntToStr(min));
  ShowMessage('Max integer value = '+IntToStr(max));
end;

Show full unit code
   Min integer value = -2147483648
   Max integer value = 2147483647
 
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