Title: Different ways to round number
Use Trunc function for getting integer value of number.
Use Round function for getting nearest whole number.
And Str procedure converts number to a string with specific representation.
procedure TForm1.Button1Click(Sender: TObject);
var
St: string;
Number: Real;
begin
Number:=StrToFloat(Edit1.Text);
Label2.Caption:='Trunc - '+FloatToStr(Trunc(Number));
Label3.Caption:='Round - '+FloatToStr(Round(Number));
Str(Number:4:2, St);
Label4.Caption:=St;
end;