//program_looping_while
#include<iostream>
using namespace std;
main ()
{
system("cls");
int x=0,y=0;
while (x<=3){
cout<<x;
x++; // 3 kali
}
cout<<endl;
while(y<=3){
cout<<y;
++y; // 3 kali
}
cout<<endl;
system("pause");
return 0;
}
