public class ReverseNestedLoop {
  public static void main(String[] args) {
    // 1
    // 2 3
    // 4 5 6
    // 7 8 9 10
    // we need to create a nested loop that can print this pyramid.

    int r = 1;
    for (int i = 1; i <= 4; i++) {
      System.out.println("");
      for (int j = 1; j <= i; j++) {
        System.out.print(j);
        System.out.print("\t");
        // r++;
      }
    }
  }
}