C program for to find perfect number or not

Perfect Number : A perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the number itself. For example 6 is a perfect number because 1 + 2 + 3 = 6 that is equal to number itself.

 

 #include<stdio.h>  
 int main()  
 {  
   int no, i = 1, sum = 0;  
   printf("Enter No : ");  
   scanf("%d", &no);  
   while( i < no )  
   {  
     if( no % i == 0 )  
       sum = sum + i;  
     i++;  
   }  
   if( sum == no )  
     printf("\nPerfect Number");  
   else  
     printf("\nNot Perfect Number");  
   return 0;  
 }