GFG PTOD | 24 Jan | Detect Loop in linked list

// Function to check if the linked list has a loop.
    bool detectLoop(Node* head) {
        // your code here
        Node *slow=head, *fast=head;
        while(fast && fast->next) {
            slow = slow->next;
            fast = fast->next->next;
            if(slow == fast) return true;
        }
        return false;
    }