Answer by Sonu Mishra for How to detect a loop in a linked list?

// linked list find loop function

int findLoop(struct Node* head)
{
    struct Node* slow = head, *fast = head;
    while(slow && fast && fast->next)
    {
        slow = slow->next;
        fast = fast->next->next;
        if(slow == fast)
            return 1;
    }
 return 0;
}