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.

Tham khảo

Var s,i:integer;
begin
 S:= 0;
 For i:= 1 to 10 do s:=s+1;
 Writeln (‘tong cua 10 so tu nhien dau tien la:’,s);
 Readln
End.

Var i,s:integer;

Begin

For i:=1 to 10 do

s:=s+i;

Write('Tong la ',s);

Readln;

End.

Câu 8.

program im_14424;

uses crt;

var S: byte;

i: byte;

begin

clrscr;

S:=0;

for i:=1 to 20 do

S:=S+i;

writeln('Tong cua 20 so tu nhien dau tien la: ,S);

readln

end.
Câu 9.

j:=2 → Gán j = 2.

for i:=1 to 5 do → lặp lại 5 lần

j:=j+2 → 

Lần 1: 4

Lần 2: 6

Lần 3: 10

Lần 4: 12

Lần 5: 14

 Câu 1:

uses crt;
var sum,i:longint;
begin
clrscr;sum:=0;
for i:=1 to 20 do sum:=sum+i;
write(sum);
readln
end.

Câu 2:

i = 1; j = 4i = 2; j = 6i = 3; j = 8i = 4; j = 10i = 5; j = 12

Program HOC24;

var i,n: integer;

s: longint;

begin

write('Nhap n : '); readln(n);

s:=0;

for i:=1 to n do if i mod 2=0 then s:=s+i;

write('S = ',s);

readln

end.

pascal

program sum_of_evens;

var
  i, n, sum: integer;

begin
  write('Enter a positive integer: ');
  readln(n);
  
  sum := 0;
  
  for i := 2 to n step 2 do
  begin
    sum := sum + i;
  end;
  
  writeln('The sum of even numbers from 2 to ', n, ' is ', sum);
end.

#include <bits/stdc++.h>

using namespace std;

long long i,n,t;

int main()

{

cin>>n;

t=0;

for (i=1; i<=n; i++) t+=i;

cout<<t;

return 0;

}

#include <bits/stdc++.h>

using namespace std;

long long i,t;

int main()

{

t=0;

for (i=1; i<=30; i++) t+=i;

cout<<t;

return 0;

}