C Program to Find Given Number is Perfect or Not

#include<stdio.h>
int main ()
{
  int n, i = 1, sum = 0;
  printf ("\nEnter a Number : ");
  scanf ("%d", &n);
  while (i < n)
    {
      if (n % i == 0)
	sum = sum + i;
      i++;
    }
  if (sum == n)
    printf ("%d is a Perfect Number", i);
  else
    printf ("%d is Not a Perfect Number", i);
  return 0;
}

OUTPUT:

Enter a Number : 6
 
6 is a Perfect Number