콘솔창에 입력된 숫자의 Factorial 값을 구하시오.

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		System.out.print("Factorial을 구할 수는 : ");
		int number = sc.nextInt();
		int factorialsum = factorial(number);
		System.out.println(number + "! = " + factorialsum);
		
	}

	private static int factorial(int number) {
		
		int sum = 1;
		for (int i = 2; i<= number; i++) {
			sum = sum * i; //sum *= i;
		}		
		return sum;
		
	}

}

import java.util.Scanner;

public class Main {

	private static Scanner sc;

	public static void main(String[] args) {
		
		sc = new Scanner(System.in);
		System.out.print("Factorial을 구할 수는 : ");
		int number = sc.nextInt();
		int factorialsum = factorial(number);
		System.out.println(number + "! = " + factorialsum);
		
	}

	private static int factorial(int number) {
		
		if (number ==1) {
			return 1;
		} else {
			return number * factorial(number -1);
		}
	
	}

}