Unit 'DateUtils' Package
[Overview][Constants][Classes][Procedures and functions][Index] [#rtl]

WeekSpan

Calculate the approximate number of weeks between two TDateTime values.

Declaration

Source position: dateutil.inc line 295

function WeekSpan(

  const ANow: TDateTime;

  const AThen: TDateTime

):Double;

Arguments

ANow

  

First moment in time.

AThen

  

Second moment in time.

Function result

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

Description

WeekSpan returns the number of weeks between ANow and AThen, including any fractional parts of a week.

See also

YearSpan

  

Calculate the approximate number of years between two TDateTime values.

MonthSpan

  

Calculate the approximate number of months 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.

MilliSecondSpan

  

Calculate the approximate number of milliseconds between two TDateTime values.

WeeksBetween

  

Calculate the number of whole weeks between two TDateTime values.

Example

Program Example57;

{ This program demonstrates the WeekSpan function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,ThenDateTime);

begin
 Write('Number of weeks between ');
 Write(DateToStr(Thenand ',DateToStr(ANow));
 Writeln(' : ',WeekSpan(ANow,ThenStr(ANow));
end;

Var
  D1,D2 : TDateTime;

Begin
  D1:=Today;
  D2:=Today-7;
  Test(D1,D2);
  D2:=Today-8;
  Test(D1,D2);
  D2:=Today-14;
  Test(D1,D2);
  D2:=Today-35;
  Test(D1,D2);
  D2:=Today-36;
  Test(D1,D2);
  D2:=Today-17;
  Test(D1,D2);
End.

Documentation generated on: Dec 10 2024