Factorial.java

package numbers;

import java.util.Scanner;

public class Factorial {
	
	private static int factorial(int num){
		if(num == 1 || num == 0) return 1;
		else return num * factorial(num - 1);
	}

	public static void main(String[] args) {
		Scanner scannerObject = new Scanner(System.in);		
		int factorialNum = scannerObject.nextInt();
		
		//ITERATION
		int sum = 1;
		for(int i = 1; i <= factorialNum; i++){
			sum = sum * i;
		}
		System.out.println("Iteration: " + sum);
		
		//RECURSION
		System.out.println("Recursion: " + factorial(factorialNum));
	}

}