[백준][Java] 10872번 팩토리얼

n! = n * (n-1) * (n-2) * ... * 2 * 1

팩토리얼 구현

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import java.util.*; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int input = sc.nextInt(); int res=1; for(int i=input;i>=1;i--) { res*=i; } System.out.println(res); } }