| Description |
The IncDay function returns a TDateTime value that is NumberOfDays greater than the passed StartDateTime value.
The year and month values are incremented as appropriate.
The increment value is optional, being 1 by default.
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| Notes |
There is no DecDay function.
Instead, use IncDay with a negative increment.
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| Related commands |
| IncMinute |
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Increments a TDateTime variable by + or - number of minutes |
| IncMonth |
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Increments a TDateTime variable by a number of months |
| IncYear |
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Increments a TDateTime variable by a number of years |
| IncSecond |
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Increments a TDateTime variable by + or - number of seconds |
| IncMillisecond |
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Increments a TDateTime variable by + or - number of milliseconds |
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| Example code : A simple example of increment and decrement |
// Full Unit code.
// -----------------------------------------------------------
// You must store this code in a unit called Unit1 with a form
// called Form1 that has an OnCreate event called FormCreate.
unit Unit1;
interface
uses
DateUtils, // Unit containing the IncDay command
SysUtils,
Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm} // Include form definitions
procedure TForm1.FormCreate(Sender: TObject);
var
myDate : TDateTime;
begin
// Set up our date just before the end of the year 2000
myDate := EncodeDate(2000, 12, 30);
ShowMessage('myDate = '+DateToStr(myDate));
// Add 10 days to this date
myDate := IncDay(myDate, 10);
ShowMessage('myDate + 10 days = '+DateToStr(myDate));
// Subtract 12 days from this date
myDate := IncDay(myDate, -12);
ShowMessage('myDate - 12 days = '+DateToStr(myDate));
end;
end.
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| Hide full unit code |
myDate = 30/12/2000
myDate + 10 days = 09/01/2001
myDate - 12 days = 29/12/2000
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