Counting time of for-loops in Java

import java.time.Duration;
import java.time.Instant;

public class Clock {

    // Method
    public static long countTimeOfForLoops(int N){
        long start = System.currentTimeMillis();
        for(int i=0; i<Math.pow(10, N); i++){
            // Some time passes away
        }
        long end = System.currentTimeMillis();
        long elapsedTimeInMillis = end - start;
        return elapsedTimeInMillis;
    }

    public static void main(String[] args) {
         for(int i=0; i<10; i++){
             System.out.println("Time for looping " + Math.pow(10, i) + " times: " + (int)countTimeOfForLoops(i));
         }
    }

}