HourSpan

Calculate the approximate number of hours between two TDateTime values.

Declaration

Source position: dateutil.inc line 296

Arguments

Function result

Number (fractions included) of hours between ANow and AThen.

Description

HourSpan returns the number of Hours between ANow and AThen, including any fractional parts of a Hour.

See also

Example

Program Example67;

{ This program demonstrates the HourSpan function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,ThenDateTime);

begin
 Write('Number of hours between ');
 Write(DateTimeToStr(Thenand ',DateTimeToStr(ANow));
 Writeln(' : ',HourSpan(ANow,Then;
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.