Delphi Basics : Exit command

DelphiBasics

Exit
Procedure

Exit abruptly from a function or procedure

System unit

procedure Exit();

Description

The Exit procedure abruptly terminates the current function or procedure.

If exiting a function, then Result contains the last set value.

Warning : use with caution - jumping is a concept at odds with structured coding - it makes code maintenance difficult.

Related commands

Break		Forces a jump out of a single loop
Continue		Forces a jump to the next iteration of a loop
Goto		Forces a jump to a label, regardless of nesting
Halt		Terminates the program with an optional dialog
RunError		Terminates the program with an error dialog

Download this web site as a Windows program.

Example code : Exit a proc when a user cancels data entry

begin
  // Ask the user for their name
  ShowMessage('Name = '+AskForName);
end;

// Ask the user for first and second names
function TForm1.AskForName: string;
var
  firstName, secondName : string;
begin
  Result := 'Lazy person';
  repeat
    if not InputQuery('Test program', 'First name :', firstName)
    then Exit;
    if not InputQuery('Test program', 'Second name :', secondName)
    then Exit;
  until (firstName <> '') or (secondName <> '');

  Result := firstName + ' ' + secondName;
end;

Show full unit code

  If the user cancels from the first or second name dialogs, the ShowMessage dialog gives:

  Name = Lazy person