Factorial with long

Lab Java Beginner 10 points

Read n (0–20) and print n!.

Input

One integer.

Output

Example

Input

Output

Sample input available Sample output available

Editor

Java

Hints

20! is too big for an int but fits in a long.

Solution explanation

21! overflows even a long; BigInteger (Advanced chapter) handles any size.

Show solution

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        long result = 1;
        for (int i = 2; i <= n; i++) {
            result *= i;
        }
        System.out.println(result);
    }
}

Output

Answer