Calculate Factorial of a Number using Recursion

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class FactorialUsingRecursion {

public static void main(String args[]) throws NumberFormatException, IOException{

System.out.println("Enter the number: ");

BufferedReader br=

new BufferedReader(new InputStreamReader(System.in));

int a = Integer.parseInt(br.readLine());

int result= fact(a);

System.out.println("Factorial of the number is: " + result);

}

static int fact(int b)

{

if(b <= 1)

return 1;

else

return b * fact(b-1);

}

}