// SumSeries series
// 1 + 2 + 3 + 4 + 5 + 6 + .... + 10
// ANS: 55 
// Mukesh Tekwani

class SumSeries
{
	public static void main(String args[])  //args is an array or a collection
	{
		int sum = 0;
		int i;   //counter variable
		int n;

		//java SumSeries 10    // "10" is stored in args[0]

		n = Integer.parseInt(args[0]);   //function name ---> parseInt  parse ---> scan/understand
		// n = 10

		for (i = 1; i <= n; i++)
		{
			sum = sum + i;      
		}

		System.out.println("Sum of series is : "  + sum);
	}
}