Java-Advanced/algorithms/FactorialEx.java at master · janbodnar/Java-Advanced · GitHub

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package com.zetcode;

import java.math.BigInteger;

import java.util.Scanner;

public class FactorialEx {

public static void main(String[] args) {

var scanner = new Scanner(System.in);

System.out.print("Enter a number: ");

int n = scanner.nextInt();

var fact = factorial(n);

System.out.printf("%d! is %d", n, fact);

}

private static BigInteger factorial(int value) {

var result = BigInteger.ONE;

if (value != 0 && value != 1) {

for (int i = 2; i <= value; i++) {

result = result.multiply(BigInteger.valueOf(i));

}

return result;

}

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