HoursBetween

Calculate the number of whole hours between two DateTime values.

Declaration

Source position: dateutil.inc line 259

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.

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.