C Program For Perfect Number

C Program :

/* Aim: Write a c program to check the perfect number. Example: 6 (1+2+3),128(1+2+4+7+14)

#include<stdio.h>
void main()
{ 
	int i=1,num,sum=0;
  
	printf("\n Enter any number:- ");
	scanf("%d",&num);

	do
	{ 
		if (num%i==0)
		{ 
		sum+=i;
		}
	i++; 
	}while(i<num);
 
	if (num==sum)
	{
	printf("\n %d is a perfect number",num);
	}
	else 
	{
	printf("\n %d is not a perfect number",num);
	} 
	printf("\n \n");

} // End of the code

/* Output of above code:-

[root@localhost ~]# cc L21.c
[root@localhost ~]# ./a.out

 Enter any number:- 28

 28 is a perfect number */