uses crt;

var i:integer;

a:array[1..20]of string;

begin

clrscr;

for i:=1 to 20 do readln(a[i]);

for i:=1 to 20 do 

  writeln('Xin chao, ban thu ',i,' ten la: ',a[i]);

readln;

end.

Uses crt;

var s,n,i: integer;

begin clrscr;

readln(n);

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

writeln(s);

readln;

end.

Program HOC24;

var i,n: integer;

S: longint;

begin

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

i:=2; s:=0;

while i<=n do

begin

s:=s+i;

i:=i+2;

end;

write('S=',S);

readln

end.

program TongCacSoChan;
var
    n, s, i: integer;
begin
    write('Nhap n: ');
    readln(n);
    s := 0;
    i := 2;
    while i <= n do
    begin
        s := s + i;
        i := i + 2;
    end;
    writeln('Tong cac so chan la: ', s);
    readln;
end.

#include <bits/stdc++.h>

using namespace std;

int main()

{

int n,t=0;

cin>>n;

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

if (i%6==0) t+=i;

cout<<t;

return 0;

}

#include <bits/stdc++.h>

using namespace std;

long long n,i,t;

int main()

{

cin>>n;

t=0;

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

if (i%2==0) t+=i;

cout<<t;

return 0;

}

#include <bits/stdc++.h>

using namespace std;

long long n,i,t;

int main()

{

cin>>n;

t=0;

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

if (i%2!=0) t+=i;

cout<<t;

return 0;

}

n = int(input("Nhap n: "))
sum_even = 0
for i in range(2, n+1, 2):
    sum_even += i
print("Tong cac so chan lien tiep den", n, "la:", sum_even)

python ha:0?

Chọn A

A