Simple Java program to calculate superfactorial (sf(n) or s$) of given non-negative integer.

import java.util.Scanner;

// 2018 TheFlyingKeyboard and released under MIT License
// theflyingkeyboard.net
public class Main {
    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        int n;

        System.out.println("Enter a number: ");
        n = reader.nextInt(); //Reads integer from keyboard

        System.out.println("Superfactorial of: " + n + " is equal to: " + superfactorial(n));
    }

    private static int superfactorial(int n){
        int superFact = 1;

        for(int i = 2; i <= n; ++i){
            superFact *= factorial(i);
        }

        return superFact;
    }

    private static int factorial(int n){
        int fact = 1;

        for(int i = 2; i <= n; ++i){
            fact *= i;
        }

        return fact;
    }}

 



Java Int Superfactorial sf(n)
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