#include <stdio.h>
int main()
{

    int n, i = 1;
    int sum = 0;
    printf("Enter value of n to find sum upto that number\n");
    scanf("%d", &n);
    do
    {
        sum = sum + i;
        i++;
    } while (i <= n);
    printf("Sum of %d  natural numbers is %d", n, sum);
    return 0;
}

//..........Coded by ARADHANA MISHRA