public class Sum {
	public int computeSum(int n) {
		int i;
		int sum;
		
		sum = 0;
		i = 1;
		while (i <= n) {
			sum = sum + i;
			i = i + 1;
		}
		
		return sum;
	}
	
	static public void main(String[] args) {
		Sum sum = new Sum();
		int value = sum.computeSum(5);
		System.out.println("Sum = " + value);
	}
}