Program to check whether the given no is Perfect number or not

#include<stdio.h>

#include<conio.h>

main()

{

int n, i , c = 0;

printf (“enter a number”);

scanf (“ %d”, & n);

for (i=1; i < = n/2;  i++)

{

  If(n%i==0)

  c=c+i;

}

if (c==n)

printf (“perfect number”);

else

printf (“not a perfect number”);

getch();

}

Out Put:

Enter a no 89

Not a perfect number

Enter a no 6

Perfect number