coba pakai fungsiku ini dijamin enak

function IsAngka(const text: string): Boolean;
const
  angka =['0'..'9'];
var
  I: Integer;
begin
  Result := False;
  if (Length(text) = 0) or not (text[1] in angka) then
Exit;
  for I := 2 to Length(text) do if not (text[I] in
angka) then Exit;
  Result := True;
end;

function IsHuruf(const text: string): Boolean;
const
  Alpha = ['A'..'Z', 'a'..'z'];
var
  I: Integer;
begin
  Result := False;
  if (Length(text) = 0) or not (text[1] in Alpha) then
Exit;
  for I := 2 to Length(text) do if not (text[I] in
Alpha) then Exit;
  Result := True;
end;

function Isoperator(const text: string): Boolean;
const
  oper = ['-','+','*','/'];
var
  I: Integer;
begin
  Result := False;
  if (Length(text) = 0) or not (text[1] in oper) then
Exit;
  for I := 2 to Length(text) do if not (text[I] in
oper) then Exit;
  Result := True;
end;





--- Anwar Sanusi <[EMAIL PROTECTED]> wrote:
> Hi all,
> 
> gimana caranya kita mengecek nilai sebuah string itu
> alphabet atau numeric ?
> 
> thanks
> Anwar
> 
> 
> 


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