HoursBetween¶

Calculate the number of whole hours between two TDateTime values.

Declaration¶

Source position: dateutil.inc line 283

function HoursBetween(const ANow: TDateTime; const AThen: TDateTime)
                      : Int64;

Arguments¶

Name	Description
ANow	First TDateTime value.
AThen	Second TDateTime 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¶

Name	Description
YearsBetween	Calculate the number of whole years between two TDateTime values.
MonthsBetween	Calculate the number of whole months between two TDateTime values.
WeeksBetween	Calculate the number of whole weeks between two TDateTime values.
DaysBetween	Number of whole days between two TDateTime values.
MinutesBetween	Calculate the number of whole minutes between two TDateTime values.
SecondsBetween	Calculate the number of whole seconds between two TDateTime values.
MilliSecondsBetween	Calculate the number of whole milliseconds between two TDateTime 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.