public class example3 {
	public static int fact(int n) {
		int m;
		if(n==1) return 1;
		m=fact(n-1)*n;
		return m;
	}
	public static void main(String args[]) {
		int n=10,i=1,sum=0;
		for(i=1;i<=n;i++) {
			sum=sum+i;
		}
		System.out.println(sum);
		System.out.println("10的階乘是:"+fact(n));
	}
}