[Overview][Constants][Procedures and functions][Index] Reference for unit 'DateUtils' (#rtl)

SecondsBetween

Calculate the number of whole seconds between two TDateTime values.

Declaration

Source position: dateutil.inc line 275

 function SecondsBetween( const ANow: TDateTime; const AThen: TDateTime ):Int64;

Arguments

 ANow First moment in time AThen Second moment in time

Function result

Number of seconds between ANow and AThen

Description

SecondsBetween returns the number of whole seconds between ANow and AThen. This means the fractional part of a second (milliseconds etc.) is dropped.

 YearsBetween Calculate the number of whole years between two TDateTime values MonthsBetween Calculate the number of whole months between two TDateTime values WeeksBetween Calculate the number of whole weeks between two TDateTime values DaysBetween Number of whole days between two TDateTime values. HoursBetween Calculate the number of whole hours between two TDateTime values. MinutesBetween Calculate the number of whole minutes between two TDateTime values. MilliSecondsBetween Calculate the number of whole milliseconds between two TDateTime values.

Example

```Program Example61;

{ This program demonstrates the SecondsBetween function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,AThen : TDateTime);

begin
Write('Number of seconds between ');
Write(TimeToStr(AThen),' and ',TimeToStr(ANow));
Writeln(' : ',SecondsBetween(ANow,AThen));
end;

Var
D1,D2 : TDateTime;

Begin
D1:=Now;
D2:=D1-(999*OneMilliSecond);
Test(D1,D2);
D2:=D1-(1001*OneMilliSecond);
Test(D1,D2);
D2:=D1-(2001*OneMilliSecond);
Test(D1,D2);
D2:=D1-(5001*OneMilliSecond);
Test(D1,D2);
D2:=D1-(5.4*OneSecond);
Test(D1,D2);
D2:=D1-(2.5*OneSecond);
Test(D1,D2);
End.
```