Coding java deviasi

package deviasi;
import java.util.Scanner;

public class Deviasi {

 public static void main(String[] iriahus) {
 
  Scanner s = new Scanner(System.in);
 
  final double T_NUM = 10;
  int n = 0;
  double sigmaN = 0;
  double sigmaN2 = 0;
  double sum = 0;
 
  System.out.print("Input 10 nilai: ");
 
  while (n < T_NUM) {
   double num = s.nextDouble();
   sum += num;
   sigmaN = sum;
   sigmaN2 += num * num;
   n++;
  }
 
  System.out.println("Meannya adalah " + (sum / T_NUM));
  System.out.println("Standard deviasinya adalah " +
     Math.sqrt((sigmaN2 - sigmaN * sigmaN / T_NUM) / (n - 1)));
 }

}