C++ Program:

Example:

      *
    * *
  * * *
* * * * 

#include <iostream>
using namespace std;

int main() {
  int rows;
  cout<<"Enter number of rows : ";
  cin>>rows;
  for(int i=rows; i>=1; i--) {
    for(int j=1; j<=rows; j++) {
      if(j<i)cout<<"  ";
      else cout<<"* ";
    }
    cout<<endl;
  }
  return 0;
}

Output:

  Enter number of rows : 4
        *
      * *
    * * *
  * * * *

Main logic :

for(int i=rows; i>=1; i--) {  //rows : number of rows to print
  for(int j=1; j<=rows; j++) {
    if(j<i)cout<<"  ";
    else cout<<"* ";
  }
  cout<<endl;
}

You can print any thing in this pattern, just replace your value with *