Code:
class N2
{
  public static void main(String[] args){
	  
	  int a,b,c;
	 
	  int  sum=0;
	 
	  for(int i=0;i<=args.length;i++)
	  {	  
		  {
			  
			  sum+=i;
			  
		  }
		  
	      System.out.println(sum);
	 }
 
}
}