How will u find whether a linked list has a loop or not?

Answer Posted / s.v.prasad reddy

findloop(struct node *start)
{
struct node *ptr,*ptr1;
start=ptr;

while(ptr!=NULL)
{
ptr1=ptr->next;

while(ptr1!=NULL)
{
if(ptr1->link==ptr->link)
{
printf("\nLoop found at %d node",ptr->data);
exit(0);
}
ptr1=ptr1->link;
}
ptr=ptr->link;
}
printf("\nNo Loop found in list");
}

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