sum of n^2 natural numbers

/* with using of mathematical formulae*/

import java.util.*;
 class NSquare {

public static void main(String[] args) {
Scanner scan=new Scanner(System.in);
System.out.println("enter number");
int n=scan.nextInt();
int S=n*(n+1)*(2*n+1)/6;
        System.out.println("sum of natural n^2: "+S);

}}

OUTPUT:

enter number
10

sum of natural n^2:   385


/* with java logic and using for loop*/

import java.util.*;

 class NSquare {

public static void main(String[] args) {

Scanner scan=new Scanner(System.in);

         int sum=0;

System.out.println("enter number");

int n=scan.nextInt();

for(int i=0;i<=n;i++)

{

sum=sum+(i*i);
}

System.out.println(sum);

}}

OUTPUT:

enter number
10

sum of natural n^2:   385