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

HoursBetween

Calculate the number of whole hours between two DateTime values.

Declaration

Source position: dateutil.inc line 260

function HoursBetween(

  const ANow: TDateTime;

  const AThen: TDateTime

):Int64;

Arguments

ANow

  

First DateTime value

AThen

  

Second DateTime value

Function result

Number of hours between ANow and AThen

Description

HoursBetween returns the number of whole hours between ANow and AThen. This means the fractional part of an hour (minutes,seconds etc.) is dropped.

See also

YearsBetween

  

Calculate the number of whole years between two DateTime values

MonthsBetween

  

Calculate the number of whole months between two DateTime values

WeeksBetween

  

Calculate the number of whole weeks between two DateTime values

DaysBetween

  

Number of whole days between two DateTime values.

MinutesBetween

  

Calculate the number of whole minutes between two DateTime values.

SecondsBetween

  

Calculate the number of whole seconds between two DateTime values.

MilliSecondsBetween

  

Calculate the number of whole milliseconds between two DateTime values.

Example

Program Example59;

{ This program demonstrates the HoursBetween function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,AThen : TDateTime);

begin
 Write('Number of hours between ');
 Write(DateTimeToStr(AThen),' and ',DateTimeToStr(ANow));
 Writeln(' : ',HoursBetween(ANow,AThen));
end;

Var
  D1,D2 : TDateTime;

Begin
  D1:=Now;
  D2:=D1-(59*OneMinute);
  Test(D1,D2);
  D2:=D1-(61*OneMinute);
  Test(D1,D2);
  D2:=D1-(122*OneMinute);
  Test(D1,D2);
  D2:=D1-(306*OneMinute);
  Test(D1,D2);
  D2:=D1-(5.4*OneHour);
  Test(D1,D2);
  D2:=D1-(2.5*OneHour);
  Test(D1,D2);
End.

Documentation generated on: Nov 16 2015