[백준] 10872번 팩토리얼 JAVA

팩토리얼

import java.io.*;
import java.util.*;

public class Main {
    public static final int MAX = 1000000;
    public static void main(String args[]) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        int inputNum = Integer.parseInt(reader.readLine());
        int answer = 1;
        for(int i = 2; i <= inputNum; i++){
            answer *= i;
        }
        bw.append(Integer.toString(answer));
        bw.write("\n");

        reader.close();
        bw.flush();
    }
}