DaySpan

Calculate the approximate number of days between two TDateTime values.

Declaration

Source position: dateutil.inc line 296

Arguments

Function result

Number (fractions included) of days between ANow and AThen.

Description

DaySpan returns the number of Days between ANow and AThen, including any fractional parts of a Day.

See also

Example

Program Example66;

{ This program demonstrates the DaySpan function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,ThenDateTime);

begin
 Write('Number of days between ');
 Write(DateTimeToStr(Thenand ',DateTimeToStr(ANow));
 Writeln(' : ',DaySpan(ANow,ThenateTimeToStr(ANow));
end;

Var
  D1,D2 : TDateTime;

Begin
  D1:=Now;
  D2:=Today-23/24;
  Test(D1,D2);
  D2:=Today-1;
  Test(D1,D2);
  D2:=Today-25/24;
  Test(D1,D2);
  D2:=Today-26/24;
  Test(D1,D2);
  D2:=Today-5.4;
  Test(D1,D2);
  D2:=Today-2.5;
  Test(D1,D2);
End.