Sum of n natural numbers

Problem to sum the natural numbers from 1 to n.

Example-1:

Input    : n = 5
Output   : 15   
Explain  : 1+2+3+4+5 = 15.

Example-2:

Input    : n = 4
Output   : 10
Explain  : 1+2+3+4 = 10

Solution

public class Main
{
    public static void main(String [] args)
    {
        int n = 5;

        int sum = 0;

        for(int i=1;i<=n;i++)
        {
            sum = sum+i;
        }

        System.out.print(sum);
    }
}

n = 5

k = 0

for i in range(1,n+1):

    k += i

print(k)

Output