JAva階乗和(1+2+3...+100)

public class Test
{
	public static void main(String[] args){
		System.out.println("  :"+jieCheng(5));
		System.out.println("  :"+f(100));
	}
	public static int jieCheng(int i){
			if(i==1)
				return 1;
			else 
				return i*jieCheng(i-1);
	}
	public static int f(int i){
			if(i==1)
			return 1;
			else 
			return i+f(i-1);
	}

}