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

MilliSecondSpan

Calculate the approximate number of milliseconds between two TDateTime values.

Declaration

Source position: dateutil.inc line 278

function MilliSecondSpan(

  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

MilliSecondSpan returns the number of milliseconds between ANow and AThen. Since millisecond is the smallest fraction of a TDateTime indication, the returned number will always be an integer value.

See also

YearSpan

  

Calculate the approximate number of years between two TDateTime values.

MonthSpan

  

Calculate the approximate number of months between two TDateTime values.

WeekSpan

  

Calculate the approximate number of weeks between two TDateTime values.

DaySpan

  

Calculate the approximate number of days between two TDateTime values.

HourSpan

  

Calculate the approximate number of hours between two TDateTime values.

MinuteSpan

  

Calculate the approximate number of minutes between two TDateTime values.

SecondSpan

  

Calculate the approximate number of seconds between two TDateTime values.

MilliSecondsBetween

  

Calculate the number of whole milliseconds between two TDateTime values.

Example

Program Example70;

{ This program demonstrates the MilliSecondSpan function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,AThen : TDateTime);

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

Var
  D1,D2 : TDateTime;

Begin
  D1:=Now;
  D2:=D1-(0.9*OneMilliSecond);
  Test(D1,D2);
  D2:=D1-(1.0*OneMilliSecond);
  Test(D1,D2);
  D2:=D1-(1.1*OneMilliSecond);
  Test(D1,D2);
  D2:=D1-(2.5*OneMilliSecond);
  Test(D1,D2);
End.

Documentation generated on: Jun 23 2021