C Program to find sum of n natural numbers

//Program to find sum of n natural numbers
#include<stdio.h>
int main()
{
    int n,sum;
    printf("\n enter a natual number:");
    scanf("%d",&n);
    sum=n*(n+1)/2;
    printf("\n sum of %d natural numbers is : %d \n",n,sum);
return 0;
}