모드는 mod 연산자를 사용하시면 됩니다.

var
  value0, value1, value 2: Extended;
begin
  value0 := 5;
  value1 := 2;
  value2 := value0 mod value1;

과 같이 계산할수 있습니다.

제곱은

uses
  System.math

를 추가하고

var
  value0, value1: Extended;
begin
  value0 := 3.14;
  value1 := Sqrt(value0);

와 같이 계산하시면 됩니다.


유세건 님이 쓰신 글 :
: 델파이 계산기를 만드는데요... 모드랑 제곱 추가를 어떻게 해야할지를 모르겠습니다..제가 여기까지는 만들었는데 추가를 어떻게 해야 할까요?...
:
: unit SG;
:
: interface
:
: uses
:   System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
:   FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMX.StdCtrls,
:   FMX.Edit, FMX.Layouts;
:
: type
:   TMcal = class(TForm)
:     Layout1: TLayout;
:     Edit1: TEdit;
:     Button1: TButton;
:     Button2: TButton;
:     Button3: TButton;
:     Button4: TButton;
:     Button5: TButton;
:     Button6: TButton;
:     Button7: TButton;
:     Button8: TButton;
:     Button9: TButton;
:     Button10: TButton;
:     Button11: TButton;
:     Button12: TButton;
:     Button13: TButton;
:     Button14: TButton;
:     Button15: TButton;
:     Button16: TButton;
:     Button17: TButton;
:     Button18: TButton;
:     Button19: TButton;
:     procedure Button1Click(Sender: TObject);
:     procedure Button2Click(Sender: TObject);
:     procedure Button3Click(Sender: TObject);
:     procedure Button4Click(Sender: TObject);
:     procedure Button5Click(Sender: TObject);
:     procedure Button6Click(Sender: TObject);
:     procedure Button7Click(Sender: TObject);
:     procedure Button8Click(Sender: TObject);
:     procedure Button9Click(Sender: TObject);
:     procedure Button10Click(Sender: TObject);
:     procedure Button15Click(Sender: TObject);
:     procedure Button11Click(Sender: TObject);
:     procedure Button12Click(Sender: TObject);
:     procedure Button13Click(Sender: TObject);
:     procedure Button14Click(Sender: TObject);
:     procedure Button17Click(Sender: TObject);
:     procedure Button16Click(Sender: TObject);
:   private
:     { Private declarations }
:   public
:     { Public declarations }
:   end;
:
: var
:   Mcal: TMcal;
:   val1,val2:real;
:   operation:string;
:
: implementation
:
: {$R *.fmx}
:
: procedure TMcal.Button10Click(Sender: TObject);
: begin
: edit1.Text:= Edit1.Text + '0'
: end;
:
: procedure TMcal.Button11Click(Sender: TObject);
: begin
: val1:= StrToFloat (edit1.Text);
: operation:='+';
: edit1.Text:=''
: end;
:
: procedure TMcal.Button12Click(Sender: TObject);
: begin
: val1:= StrToFloat (edit1.Text);
: operation:='-';
: edit1.Text:=''
: end;
:
: procedure TMcal.Button13Click(Sender: TObject);
: begin
: val1:= strTofloat (edit1.Text);
: operation:='*';
: edit1.Text:=''
: end;
:
: procedure TMcal.Button14Click(Sender: TObject);
: begin
: val1:= strtofloat (edit1.Text);
: operation:='/';
: edit1.Text:=''
: end;
:
: procedure TMcal.Button15Click(Sender: TObject);
: begin
: edit1.Text:= Edit1.Text + '.'
: end;
:
: procedure TMcal.Button16Click(Sender: TObject);
: begin
: edit1.ClearSelection;
: val1:=0;
: val2:=0;
: edit1.SetFocus;
: end;
:
: procedure TMcal.Button17Click(Sender: TObject);
: begin
: val2:= strToFloat (edit1.text);
: if operation='+' then edit1.Text:=FloatToStr (val1+val2);
: if operation='-' then edit1.Text:=FloatToStr (val1-val2);
: if operation='*' then edit1.Text:=FloatToStr (val1*val2);
: if operation='/' then edit1.Text:=FloatToStr (val1/val2);
: end;
:
: procedure TMcal.Button1Click(Sender: TObject);
: begin
:      edit1.Text:= Edit1.Text + '1'
: end;
:
: procedure TMcal.Button2Click(Sender: TObject);
: begin
:       edit1.Text:= Edit1.Text + '2'
: end;
:
: procedure TMcal.Button3Click(Sender: TObject);
: begin
:         edit1.Text:= Edit1.Text + '3'
: end;
:
: procedure TMcal.Button4Click(Sender: TObject);
: begin
:       edit1.Text:= Edit1.Text + '4'
: end;
:
: procedure TMcal.Button5Click(Sender: TObject);
: begin
: edit1.Text:= Edit1.Text + '5'
: end;
:
: procedure TMcal.Button6Click(Sender: TObject);
: begin
: edit1.Text:= Edit1.Text + '6'
: end;
:
: procedure TMcal.Button7Click(Sender: TObject);
: begin
: edit1.Text:= Edit1.Text + '7'
: end;
:
: procedure TMcal.Button8Click(Sender: TObject);
: begin
: edit1.Text:= Edit1.Text + '8'
: end;
:
: procedure TMcal.Button9Click(Sender: TObject);
: begin
: edit1.Text:= Edit1.Text + '9'
: end;
:
: end.