[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'sysutils' (#rtl)

IncMonth

Increases the month in a TDateTime value with a given amount.

Declaration

Source position: datih.inc line 129

function IncMonth(

  const DateTime: TDateTime;

  NumberOfMonths: Integer = 1

):TDateTime;

Description

IncMonth increases the month number in DateTime with NumberOfMonths. It wraps the result as to get a month between 1 and 12, and updates the year accordingly. NumberOfMonths can be negative, and can be larger than 12 (in absolute value).

Errors

None.

See also

Date

  

Return the current date.

Time

  

Returns the current time.

Now

  

Returns the current date and time.

Example

Program Example15;

{ This program demonstrates the IncMonth function }

Uses sysutils;

Var ThisDay : TDateTime;

Begin
  ThisDay:=Date;
  Writeln ('ThisDay : ',DateToStr(ThisDay));
  Writeln ('6 months ago :',DateToStr(IncMonth(ThisDay,-6)));
  Writeln ('6 months from now :' ,DateToStr(IncMonth(ThisDay,6)));
  Writeln ('12 months ago :',DateToStr(IncMonth(ThisDay,-12)));
  Writeln ('12 months from now :' ,DateToStr(IncMonth(ThisDay,12)));
  Writeln ('18 months ago :',DateToStr(IncMonth(ThisDay,-18)));
  Writeln ('18 months from now :' ,DateToStr(IncMonth(ThisDay,18)));
End.

Documentation generated on: Sep 28 2017