How to this program form

Question

*
* *
* *

Answer 1

#include <iostream>
using namespace std;

int main() {
for(int i=0;i<3;i++){
for(int j=2-i;j>0;j--) {
cout<<" ";
}
cout<<"*";
for(int k=0;k<2*i-1;k++){
cout<<" ";
}
if(i!=0)
cout<<"*";
cout<<endl;
}
return 0;
}