View Code of Problem 30

#include<stdio.h>

int main(void)
{
  int i,n;
  int sum = 0;

while(scanf("%d",&n))
{
	for (i=1; i<=n; i++)
	{
		sum+=i;
	}
	printf("%d ",sum);
	sum = 0;
}

return 0 ;

}