title: Not sure how to use System.nanoTime() for my program
body: <p>I need to measure the time in nanoseconds for my project but I'm not sure how to properly implement it into my program. I know I need to use something like:            </p>
  
  <pre><code>long startTime = System.nanoTime();
  
  ...
  
  long endTime = System.nanoTime();
  
  long timeElapsed = endTime - startTime;
  </code></pre>
  
  <p>but I'm not sure where I have to implement it so my program works properly. Here is my code:</p>
  
  <pre><code>import java.util.*;
  public class fiboSeriesRec
  {
  
  public static void main(String[] args)
  {
  
      //Scanner allows input from user, int in this case
      Scanner sc = new Scanner(System.in);
      long n;          //declare n as a long since numbers get too large for int
      System.out.println("How many numbers 'n' do you wish to see?"); //Prompts the user to input a number
      n = sc.nextInt();
  
      System.out.println("The first " + n + " Fibonacci numbers are:");
      for (long i=0; i &lt; n; i++)              //Adds each 'n' to a list as the output
      {
          System.out.println(fibonacci(i));   //Prints out the list
      }
  }
  //Recursive function for fibonacci sequence
  public static long fibonacci(long num) {
  
      if (num == 0) {
          return 0;
      }
      else if(num == 1)
      {
          return 1;
      }
  
      return fibonacci(num-1) + fibonacci(num-2);
  }
  </code></pre>
  
  <p>}</p>