program to calculate product of each column in matrix

Write a java program for sum of n natural number using user input :-

import java.util.Scanner;

public class SumNaturalNumber {

public static void main(String[] args) {

System.out.println("Enter Natural Number");

int n=sc.nextInt();

int sum=0;

int t=n;

while(n>0) {

sum=sum+n;

n--;

}

System.out.println("Sum of first "+t+" is "+sum);

}

static Scanner sc=new Scanner(System.in); 

}