1.
program ct1;
uses crt;
var i,n:integer;
begin clrscr;
writeln('Nhap so n: '); readln(n);
for i:=1 to n do
if i mod 2<>0 then write('Cac so tu nhien le la: ',i);
readln;
end.
2.
program ct2;
uses crt;
var i,n:integer;
begin clrscr;
writeln('Nhap so n: '); readln(n);
for i:=1 to n do
if i mod 2=0 then write('Cac so tu nhien chan la: ',i);
readln;
end.
Học tốt!