public class rerata{
	public static void main(String [] args){
		int a[] = new int[10];
		long start, finish;
		double waktu, rata2;
		int jumlah = 0;

		for (int i=0;i<a.length;i++){
			a[i]=i+5;
		}
		start = System.nanoTime();

		for(int i=0;i<a.length;i++){
			jumlah += a[i];
		}

		rata2 = jumlah/a.length;
		System.out.println("Rata-Rata : " +rata2);
		finish = System.nanoTime();
		waktu = finish-start;
		waktu = waktu/10000000;
		System.out.println("lama waktu : "+waktu);
	}
}