Write a C program to print all perfect number upto user given range.

PROGRAM: Write a C program to print all perfect number upto user given range.

#include<stdio.h>

#include<math.h>
main()
{
int num,i,sum,j;
printf("Enter a number to know all perfect numbers till n\n");
scanf("%d",&num);
printf("The perfect numbers between 1 and %d are:",num);
for(i=1;i<=num;i++)
{
sum=0;
for(j=1;j<i;j++)
{
if(i%j==0)
{
sum+=j;

}

}
if(sum==i)
{
printf("%d\n",i);

}

}

}

OUTPUT:-

Enter a number to know all perfect numbers till n
1000
The perfect numbers between 1 and 1000 are:
6
28
496