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

# WithinPastWeeks

Check whether two datetimes are only a number of weeks apart

## Declaration

Source position: dateutil.inc line 245

`function WithinPastWeeks(`
`const ANow: TDateTime;`
`const AThen: TDateTime;`
`const AWeeks: Integer`
`):Boolean;`

## Arguments

`ANow` |  | First moment in time
`AThen` |  | Second moment in time
`AWeeks` |  | Number of weeks to check

## Function result

True if ANow and Athen are only AWeeks apart, false otherwise

## Description

WithinPastWeeks compares the timestamps ANow and AThen and returns True if the difference between them is at most AWeeks weeks apart, or False if they are further apart.

Remark: | Since this function uses the WeeksBetween function to calculate the difference in Weeks, this means that fractional Weeks do not count, and the fractional part is simply dropped, so for two dates actually 2 and a half weeks apart, the result will also be True

## See also

WithinPastYears |  | Check whether two datetimes are only a number of years apart
WithinPastMonths |  | Check whether two datetimes are only a number of months apart
WithinPastDays |  | Check whether two datetimes are only a number of days apart
WithinPastHours |  | Check whether two datetimes are only a number of hours apart
WithinPastMinutes |  | Check whether two datetimes are only a number of minutes apart
WithinPastSeconds |  | Check whether two datetimes are only a number of seconds apart
WithinPastMilliSeconds |  | Check whether two datetimes are only a number of milliseconds apart

## Example

    Program Example49;

    { This program demonstrates the WithinPastWeeks function }

    Uses SysUtils,DateUtils;

    Procedure Test(ANow,AThen : TDateTime; AWeeks : Integer);

    begin
     Write(DateToStr(AThen),' and ',DateToStr(ANow));
     Write(' are within ',AWeeks,' weeks: ');
     Writeln(WithinPastWeeks(ANow,AThen,AWeeks));
    end;

    Var
      D1,D2 : TDateTime;

    Begin
      D1:=Today;
      D2:=Today-7;
      Test(D1,D2,1);
      D2:=Today-8;
      Test(D1,D2,1);
      D2:=Today-14;
      Test(D1,D2,1);
      D2:=Today-35;
      Test(D1,D2,5);
      D2:=Today-36;
      Test(D1,D2,5);
      D2:=Today-17;
      Test(D1,D2,1);
      Test(D1,D2,2);
      Test(D1,D2,3);
    End.

Documentation generated on: Feb 26 2014