IterativeFactorial.java

// Christopher Yonek
// Compute Factorial (Iteration)

import java.util.Scanner;
public class IterativeFactorial {
 public static void main(String[] args) {
 System.out.print("Enter a non-negative integer: ");
 Scanner userInput = new Scanner(System.in);
 int n = userInput.nextInt();
 long startTime = System.nanoTime();
 System.out.println("Factorial of " + n + " is " + factorial(n));
 long elapsedTime = System.nanoTime() - startTime;
 System.out.println(elapsedTime);
 }
 // Method to find factorial given n
 static long factorial(int n){
 long factorialAns = 1, i;
 for (i = 2; i <= n; i++)
 factorialAns *= i;
 return factorialAns;
 }

}