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

# WithinPastMonths

Check whether two datetimes are only a number of months apart

## Declaration

Source position: dateutil.inc line 244

`function WithinPastMonths(`
`const ANow: TDateTime;`
`const AThen: TDateTime;`
`const AMonths: Integer`
`):Boolean;`

## Arguments

`ANow` |  | First moment in time
`AThen` |  | Second moment in time
`AMonths` |  | Number of months to check

## Function result

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

## Description

WithinPastMonths compares the timestamps ANow and AThen and returns True if the difference between them is at most AMonths months apart, or False if they are further apart.

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

## See also

WithinPastYears |  | Check whether two datetimes are only a number of years apart
WithinPastWeeks |  | Check whether two datetimes are only a number of weeks 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 Example48;

    { This program demonstrates the WithinPastMonths function }

    Uses SysUtils,DateUtils;

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

    begin
     Write(DateToStr(AThen),' and ',DateToStr(ANow));
     Write(' are within ',AMonths,' months: ');
     Writeln(WithinPastMonths(ANow,AThen,AMonths));
    end;

    Var
      D1,D2 : TDateTime;

    Begin
      D1:=Today;
      D2:=Today-364;
      Test(D1,D2,12);
      D2:=Today-365;
      Test(D1,D2,12);
      D2:=Today-366;
      Test(D1,D2,12);
      D2:=Today-390;
      Test(D1,D2,12);
      D2:=Today-368;
      Test(D1,D2,11);
      D2:=Today-1000;
      Test(D1,D2,31);
      Test(D1,D2,32);
      Test(D1,D2,33);
    End.

Documentation generated on: Feb 26 2014