var i,s:integer;

begin

s:=0;

for i:=1 to 50 do s:=s+i;

write('Tong:', s);

readln;

end.

Program Tinh_tong ; 

Uses Crt;

Var i ,S: integer ; 

Begin

S: = 0 i;=0 ;

While  < 51 do begin 

                                       i : = i + 1 ;  

                                       S: = S + i ;

                                   end ;

 Write ('Tong la',S);

End. 

tự làm là nhanh nhất

ai đòng ý xin 1 ý kiến

1.

program tinhtong;

uses crt;

var s,i,n:integer;

begin

s:=0;

for i:=1 to 10 do s:=s+1;

writeln ('tong cua s=',s);

readln

end.

2.

program tinhtong;

uses crt;

var i,L,s:integer;

begin

write('nhap gia tri L='); readln(L);

s:=0;

for i:=1 to L do s:=s+1;

writeln('tong cua s=',s);

readln

end.

:))?

uses crt;

var i,t:integer;

begin

clrscr;

t:=0;

for i:=1 to 20 do 

  t:=t+i;

writeln(t);

readln;

end.

uses crt;

var s,i:integer;

begin

clrscr;

s:=0;

for i:=1 to 20 do 

  if i mod 2=0 then s:=s+i;

writeln('Tong cac so chan trong khoang 20 so tu nhien dau tien la: ',s);

readln;

end.

tk:

https://hoc247.net/hoi-dap/tin-hoc-8/viet-chuong-trinh-tinh-tong-100-so-tu-nhien-dau-tien-faq247722.html