FPDoc Onlineexperiment

SecondsBetween function

In unit DateUtils

Calculate the number of whole seconds between two TDateTime values.

Declaration

pascal

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.

See also

Example: `ex61`

pascal

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.

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.