FPDoc Onlineexperiment

SecondSpan function

In unit DateUtils

Calculate the approximate number of seconds between two TDateTime values.

Declaration

pascal

function SecondSpan(const ANow: TDateTime; const AThen: TDateTime)
: Double

Arguments

`ANow`	First moment in time.
`AThen`	Second moment in time.

Function result

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

Description

SecondSpan returns the number of seconds between ANow and AThen, including any fractional parts of a second.

See also

Example: `ex69`

pascal

Program Example69;

{ This program demonstrates the SecondSpan function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,AThen : TDateTime);

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