star pattern in screen

#include<iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;

    int row =1;
    while(row<=n){
        int col= 1;
        while(col<=row){
            cout<<"*";
            col=col+1;

        }
        cout<<endl;
        row = row+1;
    }

}