TRIANGLE

/* Display Triangle as follow

   1

   2 4

   3 6 9

   4 8 12 16 ... N (indicates no. of Rows) */

class Output{

 public static void main(String args[]){

  int n = Integer.parseInt(args[0]);

  for(int i=1;i<=n;i++){

   for(int j=1;j<=i;j++){

    System.out.print((i*j)+" ");

   }

   System.out.print("n");

  }

 }

}