How to write a java program to find factorial of a number

The factorial function (symbol: !) means to multiply a series of descending natural numbers.





Program Code :

import java.util.Scanner;

public class Factorial{

public static void main(String[] args){

Scanner scn =new Scanner(System.in);

int a,n,f=1;

System.out.println("Enter a number to find out factorial =");

n=scn.nextInt();

for(a=1;a<=n;a++)

f=f*a;

System.out.println(n+" ! = "+f);

}

}

Output :

 Enter a number to find out factorial =
10
10 ! = 3628800