Program c++ Deret Angka 1-20

#include<iostream>
#include<conio.h>
using namespace std;

int main() {
    int n;
    n= 1;
    while(n<= 20) {
      cout<<n;

                                                                                            n++;
     
                                                                                            }

                                                                                             getch() ;

                                                                                             }