SysUtils.IsLeapYear Function

Indicates whether a specified year is a leap year.

Pascal

function IsLeapYear(Year: Word): Boolean;

C++

Boolean IsLeapYear(Word Year);

File

SysUtils

Description

Call IsLeapYear to determine whether the year specified by the Year parameter is a leap year. Year specifies the calendar year.

Use YearOf to obtain the value of Year for IsLeapYear from a TDateTime value.

C++ Examples:

Copy Code

/*
This example requires a button and a text edit. When the
user presses the button a message indicates if the year
specified in the text edit is a leap year.
*/
bool __fastcall IsThisLeapYear(int year)
{
  return IsLeapYear(year);
}

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  int year = StrToInt(Edit1->Text);
  if (IsThisLeapYear(year))
    ShowMessage(Edit1->Text + " is a leap year.");
  else
    ShowMessage(Edit1->Text + " is not a leap year.");
}

Delphi Examples:

Copy Code

{
This example requires a button and a text edit. When the
user presses the button a message indicates if the year
specified in the text edit is a leap year.
}
function IsThisLeapYear(year : Word): Boolean;
begin
  Result := SysUtils.IsLeapYear(year);
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  year : integer;
begin
  year := StrToInt(Edit1.Text);
  if (IsThisLeapYear(year)) then
    ShowMessage(Edit1.Text + ' is a leap year.')
  else
    ShowMessage(Edit1.Text + ' is not a leap year.');
end;