SecondSpan

Calculate the approximate number of seconds between two DateTime values.

Declaration

Source position: dateutil.inc line 275

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.

YearSpan		Calculate the approximate number of years between two DateTime values.
MonthSpan		Calculate the approximate number of months between two DateTime values.
WeekSpan		Calculate the approximate number of weeks between two DateTime values.
DaySpan		Calculate the approximate number of days between two DateTime values.
HourSpan		Calculate the approximate number of hours between two DateTime values.
MinuteSpan		Calculate the approximate number of minutes between two DateTime values.
MilliSecondSpan		Calculate the approximate number of milliseconds between two DateTime values.
SecondsBetween		Calculate the number of whole seconds between two DateTime values.

Example

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.