C Program to check whether the number is Perfect Number or not

#include<stdio.h>
  int main()
  {
     int n,i=1,sum=0;
     printf("Enter 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;
  }